That may be true of some rotary enthusiasts still; I don't really know that many. I could see it being more of a thing with RX-7s, which are kind of rare and expensive. RX-8s aren't super common, but they're also not hard to find. And if the engines are due for a rebuild, they're sort of like old pianos -- people will practically give them away.

Also, climate change is a thing. I'd expect more people are aware of that these days, and its hard to justify running such an inefficient engine even if they are admittedly really cool.