Adding more tracks to RB and all this wav data needs still to be saved in the SEQ, these could grow immensely.
If you could load a wma or wav file non destructively this would increase RB's usability no end

Here's the thread you can see them getting Reaper to play wma direct with Media Foundation, after some dramas it all worked out.
v6.56+dev0430 - April 30 2022

This would be a very big step, allowing RB to read frozen SGU tracks instantly into RB,
it could just read the wav instructions from bbw2 directly into RB without bbw2 having to decompress wma, load sections into RAM then render down to wav then load into RB.