It is the nature of creativity to embrace variability. Once you settle on a single solution, you are limited to whatever set of options it offers. For that reason, I don't really want PGmusic to be my "one-size-fits-all" musical solution.
I like having options.
I like having the option to play many of the parts myself.
I like the tweakability options that are offered by the MIDI styles in BIAB.
I like the different set of options made available in RealBand.
I like the fact that they can work together or separately or even be exported for use in other music software. As far as I'm concerned, PGMusic has created a system that is already useful in so many ways, I don't have time to explore and understand them all before the next version arrives.
I see no need to think in terms of "THIS, not THAT" ... rather I think "this AND that!"