... all daw developers, except Steinberg, Apple and Digidesign. But to me this would be more realistic than the acceptance among plugin developers. We already have established standards. And it's not that you have to pay Steinberg some money if you want to release a VST.
I have no clue about DSP programming but i know know a bit about software development. Even if the environment is not perfect, you will get used to it's limitations and then you can focus on the creative part. New standard .. nah ... not soon. And I think Steinberg has learned it's lesson with VST3 ... just my oppinion.