I think the main issue with VST3 is the lack of support from Steinberg. They killed the mailing list and replaced it with a hard-to-access forum where many valid questions remain unanswered after weeks.Aleksey Vaneev wrote: ↑Thu Nov 24, 2022 10:44 am Simply put, I do not like VST3. I may rant about it like mad, but won't do it. This will not change anything and I will only feel bad next time talking to Steinberg representatives.
They used to be very quick on the mailing list, but in my percepetion they decided to reduce their communication with 3rd party developers to a bare minimum. And that is what IMHO turned VST3 into the least beloved platform in the first place.