Steinberg was trying for a really long time to get everyone to switch to vst3. I think it’s finally getting to the point where most DAWs support it. In my experience, most of the features that made VST3 an improvement haven’t really been utilized because very few people are making vst3 specific plugins, which means you still have to make your plugins work in the other formats, so very few plugins take advantage of the VST3 specific features.
In reaper, I always choose vst2 over VST3, but it’s been a while since I’ve seen any VST3 issues in reaper. Studio One seems to prefer that people use VST3.