I haven't got an RTG card. Yet. Basically money is my biggest issue, especially as The NZ dollar doesn't translate to US$ or Euro very well. And it's a long way to ship things.
My system is in my tagline, but also has a 4xEIDE interface with CD and Zip Drives. I need to get a tower and a mediator first, and probably a better accelerator. I'll get there eventually.
As to RTG-only software, obviously I'd prefer if there was non-RTG support. But I certainly don't expect the rest of the Amiga community to wait for me to catch up.
Mind you, take a program like, say, Genetic Species. It runs quite respectably on my system, but makes me very aware just how awesome it would be if only I had an RTG card.
So non-RTG support for good software might encourage people like me to sell any unnecessary body organs and get me a Voodoo 1200.