Not sure why conversation went into
RB, plugin, standalone, magical reaper, Track view, etc.

To me, this is no brainer. Making UI fully modular and configurable with workflow in mind the right way, learning from those companies whos users don't complain about UI - Problem (one of the most quoted problems in BIAB) solved.

The "guts" of the BIAB with exception 2-3 dozen of older bugs are pretty much solid. Program is fast and stable, especially considering complexity. Some bugs are related to workflow and could be addressed if they decide to tackle a well overdue UI upgrade.