I don’t think after all these years, that this is the core of the argument for not supporting VST3, or at least that was not the case a couple of years back. There is something else that has been brewing out there these past few years… and the arguments are unfortunately more often with customers (wanting VST3).
(But that is just my opinion of course, but as you I have spent many past years in-the-field, so to speak.)
Also, I’d like to know about the specifics of these claims of limitations in the VST3 API, in comparison to the VST2.4 API. Since Steinberg was also the creator of the previous VST versions, this would be very interesting to know. I.e. the specifics, not a run-around dissertation on some obscure dislike. 