This should be a very interesting thread!
My main use for BiaB is in the Pre-production phase. I input my chord progression then I choose what MIDI styles, MIDI tracks, and on occasion RTs/RDs to use. Note that sometimes I will use the RTs' MIDI charts to convert the audio tracks to MIDI tracks in my songs.
Post-production is just generating the tracks.
Everything else like choosing MIDI sound sources, modifying the tracks if needed, adding effects, recording vocals and instruments, etc is done in my DAW.
Note that I don't string songs together so I do no mastering.
+1
I use 97.543% real tracks for my work. a Few superMidi Tracks.
I do master using Logics Mastering Assistant and a limited selection of plugins