Any established developer would keep their own backups of their setups. If they only have one copy on one hard drive, I would say that such a developer isn’t very serious, or does not have a lot of experience and might as well go VST3.
There has been many discussion with various reasons why many developers have not moved to VST3 and I would say that the most piercing reasons are that “VST 2.4 could’ve been tweaked to accommodate most VST3 features”, that “there are not enough hosts supporting VST3” or that “there isn’t enough demand for VST3”. If we always follow this trail, we would never get anything new. Be happy that Steinberg has platinum balls to do these things!
As far as all those other examples of keeping the past, how do look at Microsoft’s Windows RT?
(I would say that they are in the same league as Steinberg in terms of sizable cojones.)
