Well that’s much better than nothing… hopefully the drivers continue to work for a long time.
I’m not sure how I missed this sub-forum, and the news that the hardware has been discontinued, before just now purchasing 4 units (at very good prices).
Oh, I know why … there’s zero indication of that fact on the Steinberg main website’s product pages, that I reviewed before purchasing. 
I get it. I understand why the pages are still up, but it’s still irksome.
Not sure knowing this fact would have dissuaded me. I have a hunch the controllers will continue to work without much development effort from engineering.
But even without any effort from engineering, if they coded it right, DAW features would have been highly decoupled from the controller messages, in the code, and are likely highly isolated from concerns with each other.
As for the whole Windows / Mac USB driver support concern, hopefully those will survive, as well.
My only fear there, is that both Windows and OS X are going through major architectural changes for the sake of the mobile, desktop unification.
There is, however, some hope Steinberg will do the right thing and honor its obligation to at least provide bare-minimum support.
I decided to double-down and get the full CMC series before they’re gone, completely. The fader units are still available from some sellers in Japan, for some reason.
They’re great little units.
I have faith they’re going to be supported and if not, there’s always Bome MIDI Translator Pro.
I’ve confirmed that they show up and transmit messages that can be manipulated by Bome MT. So going out of the CMCs is straightforward.
As for getting back in the CMCs (for bidirectional feedback), reverse engineering the messages they respond to might be trickier, but not impossible.
Worst case scenario, I’ve got a rack of PCs, so even if the drivers are not supported in some future OS version, or even in Cubase itself, I’ll be able to dedicated a cheap 1U rack build to Win 7 and re-route the MIDI messages out physical MIDI cables to Cubase where they could be mapped via a Generic Remote (a reason to hang on to those old Win 7 licenses before they’re all gone – as Microsoft doesn’t sell Win 7 anymore).
No promises, but if Steinberg drops support and I end up creating some useful Bome MT patches, I’ll be sure to share them here – unless Steinberg drops this forum, altogether. 
Folks, we’re living in a modern dystopia were technology somehow gets uninvented. Stuff we used to have, that was good, goes away.
Disappointing as I think more development and advancement could have been made with these units. I ended up ditching my FD units and brought back my old Houston. Going up on Ebay shortly. The automation curves draw way smoother using the Houston faders, plus I get 8 LED track names. Keeping the other units for now, but might unload those as well.
Looks like everything that worked with Cubase and its CMC controllers, and those things that didn’t, stays unchanged in 7.5.30. So, that’s good. I’ll take it.
The lack of AI working for many of Cubase’s params is still annoying. Some are just begging for AI, too. Like the track time shift slider “delay”. Of all the ones to not work… to be able to close your eyes and focus on the groove, while shifting the time with the knob is the kind of thing control surfaces were designed for.