Apple wouldn't care about Cheetah even if it was in their shop. Too less sales anyway.
The part about Cheetah very deeply embedded (if that's the right English word) is true and that it can't just recompiled and ported to Windows. There will never be a Windows version.
The rest is a mixture of prejudice and wrongly interpreted or missing data, sorry. The problem is, of course, that it's almost impossible to get the data. For example some of the market share statistics are based on web browsing, which doesn't say much, as a lot of people have different devices (for example we use out of convenience mostly our ipads for "browsing", switching to the mac when necessary (or for some reason at the moment more convenient), never using one of our windows pcs). Sales data don't tell us much because we don't know how long such a computer is used and so on.
What we know is that the desktop / laptop market was shrinking for many years, obviously going up during the pandemic because a lot more people were working from home and had to buy new hardware for that or because they were bored because of lockdowns. Also we don't know what's done with the computers that are sold (anyway, the numbers for 2020 won't say a thing). And obviously there are big differences depending on the regions. The 15 % of MacOS market share seems to be the number all the statics agree on more or less.
Piracy is still big but mostly for movies / tv shows and music, piracy allegedly taking up almost a quarter of the used bandwith worldwide, but that can be done (and is) as easily with an ipad as with an android or windows device. And no, I don't download illegally nor do I use a streaming service but instead still buy CDs (which then are ported to flac and streamed from a NAS in our home. That would be illegal in some countries, though) and Blu-rays. And it's at least 20 years or even more that someone said to me, that I should pirate movies and music. Instead they come with paid streaming services
.
For desktop software piracy we don't have reliable data, but that again differs very much from region to region. For any 3d app out there you could get a cracked version from (somehow the viruses have to be spread), windows and mac versions alike (so some of the mac users also use pirated software. From time to time we see it here). In my region it doesn't seem as widely spread as it was anymore (while the people download music and movies happily).
For windows pcs there is a market for cheap hardware, and that doesn't necessarily mean that those people are misers but just that they don't need a pc very often, some just for their own accounting, some for doing some work at home (aside from the pandemic). With a 300 $ PC you can't do much else. They aren't suited for 3d work nor gaming.
Apple Hardware is a premium product, agreed, but as long as you don't expand on better hardware, like more RAM, bigger SSDs and such, they are rather reasonably priced. As soon as you need more power, though, the prices go up insanely (I can buy several top notch SSDs for the same price I'd have to pay for an upgrade). And Apple really, really blotched it years ago when they decided that PC gaming wasn't a big market anyway. You can have high end pc hardware that's very costly (you still get more power for the buck, though), and when I built my own pc I was a bit overwhelmed by the shear mass of products available nowadays. All suited for gaming, which is the main reason why we get so powerful hardware at still a reasonable price (or halfway reasonable, looking at something like a NVIDIA 3090). And those people spend big money for their gaming rigs they could easily get an Apple for. Of course market share was lost to mobile (a lot of simple games people are quite happy with) and to consoles. There are whole brands aimed at gaming (Alienware for example by Dell). So no, not every pc users is a miser or someone who can't afford a mac.
So even if you just play games occasionally on a pc, windows is better suited for you (it's not just the hardware but gamer mouses, gamer keyboards and so on). Other reasons to use windows are for example that some people are used to it from work and don't want to learn yet another system, they do it out of habit and never tried out macos, they want to install linux, like to build their own hardware and on and on. To say that windows users don't care about user experience is just prejudice. A lot of people are convinced that it is a very good OS (technically, that's probably true), and you only really see all the shortcomings of "user experience" if you can compare it to your mac. Also Apple has some bad reputation (one reason people telling them that they lack the money or don't care for user experience or are software pirates anyway, some think that the prices are way higher than they are). In a ton of forums you can find somebody asking a question because he can't do something with MacOS and the answer is: You don't need that or Apple would have provided it. And it doesn't help that you can't even a hard disk anymore yourself in a Mac mini.
Now Blender is obviously the cheapest dcc app around, and according to a ton of videos and articles it's the best out there, far better then maya, modo, 3ds max and c4d combined, and all that for free. That's crap, but because of the hype it's today usually the first contact with 3d apps for hobbyists. 2020 it was downloaded 6,5 million times according to blender.org. Now, that's not that much, and we have even that number to take with a grain of salt, because it was during a worldwide pandemic and (depending on the region) more or less severe lockdowns, a lot of people not knowing what to do with their time (which is a sorry testament of our society imho). Most people open the thing, stare at it for a while and close it again to do something instead they don't have to learn so much. It's my personal experience, that says nothing, that most don't go further than rendering a cube or two and in best case a donut. Some stay with it, and a part of them maybe gets later another app (pirated or paid). But anyway you look at it, it's a rather small market. Something like Cheetah would have a chance, because it's inexpensive and far more accessible than Blender. But it's a very small market and it probably wouldn't be worth the work Martin would have to put in to really port it to windows. I don't have the numbers, but I sincerely doubt that any well-known 3d suite has more than 100'000 thousand customers (that would be C4d), others less than 20'000, and that all over the OSes they support. Cheetah could only get a fraction of that.
Professionals use mostly windows as you can see in any of the forums of the bigger apps. It's again because of the price (here it's true. You can get more pc power for a fraction of the price) and especially hard- and software availability). And of course that's considered. Think of a studio with 10 people or more, buying 10 very costly (and outdated) mac pros. Business is usually a matter of making money (and, sadly, for some of surviving in times as this), and I know not any manager, boss or self-employed who hasn't to consider the price (that includes of course support, failures, whatever. So a costly Mac pro, upgraded to the max, can indeed be the cheaper solution than a pc at a quarter of the price, depending very much on what you do). The main reason, though, is hard- and software availability, gpu rendering still a big thing (even if I think those times are coming to an end in the coming years because of SoC).
That works best with Nvidia GPUs, many professionals using several of them in one pc (not only two but some even more like 4 or 8), rtx gpus at the moment the best choice for that. Look at one of the most beautiful renderers out there, Maxwell, which is available for Mac and Windows. Their GPU rendering (something of their own) only works with NVIDIA, so mac users are out. According to their website with one GPU your 25x faster, with two GPUs 40 times, with four 60 times (and they used only an rtx 2060 for that, so something rather affordable).
Also there is software availability to consider, special devices you need, what the rest of your firm uses, and habit. Cheetah is good, obviously enough for your needs, but there are reasons that movie studios, game developers, product designers, architectural visualizers (or however you want to call them), vfx specialists, and so on use other 3d apps (Blender more and more among them). They may seem "bloated" and certainly look intimidating on first sight, but if you work daily in something like 3ds max, C4d or Blender you're getting used to it, know your shortcuts perfectly well and so on. For myself Modo is at least as smooth an experience as Cheetah (but I only had it relatively easy to get into it because I was a lightwave user for many years). The learning curve is steeper, but it depends on what you do what software you need. For example for VFX there seems to be nothing better suited than Houdini at this point in time.
Like I said many times before: Cheetah is the best suited app in my opinion for learning 3d. Just showing the UI of an app like Maya can turn people off of 3d who could have a lot of fun with Cheetah. For most use cases, though, it's not on a really professional level, very much depending on what you do.
With professionals, which is the reason other dcc apps stay alive (for a while), Cheetah wouldn't stand a chance. And that's ok, by the way, you still get a lot for 99 bucks.
For hobbyists, I agree, Cheetah would loose too much of it's charm in a windows version to compete against blender, silo and whatever. Especially as they like their GPU rendering, too, a lot of which works only with Nvidia or reasonably better (iray for example).