Artist usually use the same instrument, this allows for style/pattern changing on the one track rather than just A or B pattern of the instrument
This will work well with Direct Input guitars
It needs to be quick and easy to do, Drag n Drop would do it
As you drag n drop a RealTrack from the picker into the Biab timeline it will go in as 1 bar
This can be copied, moved or resized
You can play/preview it in the chord position
You can Regenerate
You can set the color of the item for a quick visual to see where it repeats on the timeline
You can adjust the volume for one section of a RealTrack or adjust the same for all occurrences of that RealTrack.

This is just piecing together Quinn Bachand Acoustic Guitar of different styles
RT3182-Style.mp3

These are movable segments representing the RealTracks, Biab will generate the track accordingly:
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https://stash.reaper.fm/u/ReaTrak (Scripts for Biab Reaper)
Working In Biab & Reaper Simultaneously and Instantly