There were so many discussions about 64bit because so many users wanted it but it was always "It's not needed as there is JBridge" but apple force it to happen by banning 32bit apps.
RealBand was always crashing for me but when it went 64bit I rarely got a crash.
All the "adding extra tracks, partial regeneration, micro chords and several others" were from years n years n years of nagging.
It took 10 years of nagging to get VstTimeInfo to be sent to VST's like EZDrummer to sync to the host.
How long have I been nagging about the BBPlugin, I have showed it working with Sforzando now, will it be another 10 years ?

It seems they don't have any time to do things as directly the Biab Win is done it's onto Mac and that holds everything up because apple are always updating every five minutes and changing their OS so apps don't work anymore, then PG spend months on it. I can run Win95 apps on Win10 but apple ban that, compatibility is not allowed.
There always has to be NEW Selling features every year, so they are way behind the eight ball.
If I could code I would be in there doing it NOW rather than spending all my time working on solutions and posting things. I think I put in more than a 40 hour week frown