I think that Charlie's answer holds the key to why 'the program offers some very powerful, complex arrangement and automatic features that most users are unaware of and mostly go unused'.

BIAB needs complicated instructions to do things which are quite simple in RB and other DAWs.

"Since 2015, BIAB has been capable of producing high quality mixes comprised of dozens of instruments onto dozens of tracks far exceeding the 8 physical tracks visible on the main screen interface".

Yes it does, but its much easier to see everything in RB and not have stuff hidden under the hood. BIAB's interface is nothing like the most popular DAWs.

Charlie you're an expert user of BIAB but many of us prefer the simplicity of RB where nothing is hidden. And maybe the growing complexity of BIAB to make it do things DAWs do perfectly well is the reason we are getting so many problems and patches.

I'm not getting problems with BIAB 2021 because I use it for its basic function - auto accompaniment. With a rough track it's then time to move to RB. Problems seem to be arising with BIAB's new 'features'.

But everyone has their own workflow and I know Charlie's expertise has helped many people who prefer to stay in BIAB start to finish.