VST3 has been around since 2008, that's 16 years. So VST3 is also old architecture by now and STILL it isn't what developers prefer or like to work with if they had a choice.
If VST3 was so great Steinberg wouldn't force this really bad license agreements where they force developers to NOT make any VST2 if they want to make VST3 as well.
Personally I had plenty of issues with VST3 versions of plugins compared to VST2 version of the same plugin. There is a difference between supported and demanding people to stop using it.
