pipeline.
thats essentially how ive done it in the past.
one biab file for intro, another for verses, another for leads, another for out to coda etc etc. and for major song key changes even more biab files.
then i put it all together in reaper.
one reason i like reaper is i can move audio around easily.
and deep edit easily.
pipeline.
i realised an added bonus of the tabbed approach.
ponder this.
a tab equals a song section marker in daw multitrack software. (eg reaper vertical marker line.)
(we could even call the tab a SSM.)
for example in reaper i use markers extensively. an example.
intro/verse1/chorus1/short lead break1/verse2/chorus2/majorleadbreak/chorus3repeat/outtro
etc etc. all markers.
so for me my tabs in biab would reflect same.
ie 9 tabs. to correlate with 9 section markers in daw.
now consider i'm in the reaper daw (or any daw), and i'm going "nah i hate that lead guitar (from biab) at bar 80".
just go to the tab (named leadbreakbar80) in biab and regen that lead, and re-export into daw, and heres the KICKER, makes lining up in daw easier cos the markers in the daw match the tabs in biab,
et VOILA ! see what i mean ?
TOTAL CORRELATION TWEEN DAW MARKERS AND BIAB.
ps i hope pg staff read this.
Interesting ideas but how about considering when you're in Reaper or any DAW and go "nah i hate that lead guitar (from biab) at bar 80" KNOWING that using your current workflow you've detailed above of saving each section of your song as an BIAB SGU file that you open in your DAW that you can edit and review and regenerate those saved files from within BIAB BEFORE you commit to moving them to your DAW. You can save a ton of time and work.
BIAB has long had a feature that allows you to make a playlist of SGU files, edit the key signature, tempo and delegate the bars and number of bars to play and even have BIAB construct up to 16 bars of transitions between each section.
For instance, you create a sgu of bars
1-4 named Intro
5-12 named Verse 1
13-21 named Chorus
22-26 named Outro to play into a 4 bar ending...
You will have 4 individual SGU files playing in sequence your song project.
If you don't like the solo in the Chorus, you can edit it by opening up just the SGU file containing the Chorus material, edit and change by regenerating only the guitar solo part, save the file using the same name of the original file (overwrite the original) and when you recreate the Medley, the new edited soloist will play leaving all of the other sections intact. This feature allows for Bar To Bar regeneration in BIAB as well as allows the user to hear his entire project before committing to moving the various SGU files over to a DAW for further processing.
This is the Song Medley Feature of BIAB
It is accessed from Tools\Song Form\Medley Maker
Medley Maker creates a complete SGU file from the list of songs that can be rendered, saved or both...
It's simple, easy, stable and operates within your current workflow.
You Should try it.
Here's a screen shot of a Medley Chord sheet I created using your file saving workflow to create a 16 bar complete song from 3 saved files.