228 Bar Import Time
I made up a 228 bar SGU for a Live Arranger demo (see below) this is how quick the tracks are injected:

Watch https://www.dropbox.com/s/vwxnc8qsztzquxx/Inject-228-Bars-Reaper.mp4?dl=0

Download Inject-228-Bars-Reaper.mp4

Live Arranger
Here's Live Arranger playing Biab tracks direct from the wma source files.
So as the midi chord is inputted each track will go to that chord in each source file.

Watch https://www.dropbox.com/s/ap6d0ttuidsperv/C-Chords-Reaper-BB-Tracks-Arranger.mp4?dl=0

Download C-Chords-Reaper-BB-Tracks-Arranger.mp4

All of these shows what Biab/RealBand/BBPlugin would be able to do.