@Shift Studio
Actually Felix was better in my opinion. Dimension, at least for me, only got worse. It's in the price, ok, but still no shadow of competition for Cheetah.
Keyshot is in another league than Dimension, and I fully agree with your assessment of this software. The GPU part sadly usually means Nvidia only, so there is probably not so much in it for most Mac Users.
And I don't know if Adobe's buy really is sad news. The people at Allegorithmic will still be the developers, and we just have to wait if they can keep up their good work under the new regime in the next years. This time around Adobe bought a solid firm, and they hope to get through them into the world of professional 3d. This time they didn't buy just some technology they wanted - they want the people, their knowledge and especially their reputation. In movies, the gaming industry and every aspect of the 3d world Allegorhitmic has a very good name. That's what Adobe really needs (well, actually not for 3D only). They bought the knowledge, the ideas and the talent. I'm no Substance user (which sounds like having a drug habit or, in my case, not), so I really would be happy to see it as a part of the Creative Cloud subscription. Like really, really happy (yes, it's quiet affordable as it is, but if you have a lot of quiet affordable things they do quiet a lot in total).
There is still the rumour that Adobe wants to buy C4d which completely makes sense, as they want to get (back) badly into this field.
As much as I dislike shelling out my money at Adobe, I have to admit, for myself subscription isn't as bad as I always thougt. They continually develop their products, and they try hard, to get (again) ahead of the competition with Photoshop and Illustrator (only with each major update I have to search a few things that I found without troube). So they did something completely new and totally unexpected: They started to listen to their users. At their version of Keynote (I don't remember the name of this Adobe fest) they presented one new function quiet prominently (with quiet some humour, well knowing that stuff like this should have been incorporated some 15 years ago): Ctrl Z. They presented it as if it was the greatest and newest invention in years.
So I hope, they have learnt from the past and will continue this path. Photoshop is still a standard, but there are lots of other apps who can do (almost) the same at a fraction of the price (well, it got cheaper over the years), and some specialized apps that are much more inventive in some parts (see for example that thread about enlarging pictures). At least they know that there is trouble ahead and that they have very strong competition (like affinity for photoshop, illustrator and soon indesign, nuke for after effects and so on. Remember the time when the only possibility to get a good PDF was Acrobat Pro?).