I have read some of the long posts praising RB and counter arguments. I tried falling in love with RB on several occasions. Full disclosure: It's not a piece of software I will be using.
Within past 3 years several important features were added to BIAB... In my view, the most significant difference (and probably the loudest argument for RB) was multiriff generation. With new Partial regeneration, it solved that missing piece for me. Couple of "pro" reasons that come to mind is that many users have their projects in RB and they need RB functioning to keep those projects alive. Also "free" is a good price to pay. This is also understandable.

What else?
What are unique features that are missing from BIAB that are in RB in working with PGmusic content? If possible, kindly keep it simple. Thanks.