Hopefully, one day, all major VSTs will provide Linux versions. Until then, running them in Linux is such a major PITA that most people just don't bother. It took me days to set up Reaper under Linux in a manner that works, JACK+Wineasio being incredibly complicated to get working (and Wineasio not working at all now since I was forced to upgrade glibc, so back to Windows 7 now), and Wine making your hair fall out with nothing running in it out-of-the-box. It would be quite a bit easier if Wine would provide ASIO support on its own though.
The problem with _some_ vsts isthat they implement things which Wine does not, which tend to be the one's that don't work at all. imho, it is better to focus on the one's that 'almost work', maybe just have a few rough edges that can be fixed. So i am not surprised that one's that just crash wine badly don't get looked at... although, i must say ~ i have never found one that crashes wine ~ although i have obviously seen many that crash/don't run... although, these days more and more seem to run well.
sometimes, software in Wine will crash just because you haven't installed XYZ dll or have an 'override' that you shouldn't (or vice versa) too.