They should be popular with ZRL riders then?
I've not tried one yet. What are the main benefits of a decent static bike over a trainer + bike?
Just speaking for myself, I'd say the main benefit is I find it really comfortable, quiet and smooth to ride (I had a bike on a Tacx Neo before). I know some people like a fair bit of side to side movement - you get none of that with the Neo bike, it's really solid and stable, but I really like that personally.
I like how much adjustability there is - I started off copying my road bike measurements because I'm really comfortable on that on the road, but I've adjusted it a bit since as I find a slightly different position more comfortable for indoor riding.
The virtual gear changes are fantastic - instant and no fear of dropping your chain etc even if changing under great stress.
Having the smart bike has made the whole zwifting experience much more enjoyable for me and I'm so glad I got one. Reading some reviews they're not for everyone though clearly and some of the things I like about them others dislike so there's an element of personal preference too.