I had a great time loading my DX-7 sounds in FM7 (and now FM8). It brought back memories from the '80s.
And I still have and use a couple of sounds from then.
I also have a patch in Dexed that I'll use one day. Why it's there rather than FM8... I've totally forgotten.
But I'd want versatile synths with me on the desert island, not role-players (although it's relative - I did several projects using only FM synthesis in their day, and was always amazed at them back then).
What makes you think so? In my opinion it‘s the other way round. If u-he didn‘t create new products in the meantime they were out of business by now. As a matter of fact, they‘re very healthy and Zebra 3 seems to be the priority next to the smaller updates. I expect a release early next year.