Matt,
sure, of course there's probably a ton of technical problems that I completely ignore. I fully realize that, it's just fun to talk about it

Only in this spirit (just to have fun, I know it's pure, baseless speculation on my part ...) it still seems to me that the problems you outline are somehow manageable.
1. in order to implement, in a useful way, multi-mic drum tracks in BIAB, you don't necessarily need more tracks than we have now. We could just use some of the tracks that now are used for instruments. Then export them as wav, go back to the song, change the drums tracks into whatever you need (bass, piano, whatever) and export again. Indeed, I do this already when I need more than 8 different RTs for the same song ... in fact, we can have an infinite number of RT for each song, as long as we export the wavs. Convienent? Of course not. Useful? Oh yes, a lot ...
And, by the way, in RealBand the track limitation is bypassed altogether (RB basically does what I do "by hand" in BIAB ... don't ask me why, I just prefer to work in BIAB. I know it's silly ...).
But the point is, again, that I dont see track number as a real limitation.
To me the real issue is wether drums tracks were actually recorded with several mics. That's where the buck stops. But that's something only the folks at PG know for sure.
2. Yes, 24 bit tracks would take more memory. However, we are not talking gigabytes. A 24bit wav file is 50% larger than a 16 bit, I beleive. A 3 min track is about 45 mb at 24 bit. You need 20 (!) of those to get to just 1 gigabyte. I don't know, I could be wrong, but nowadays that seems manageable even by most older computers running with a 32bit OS. And, by the way, if I do some serious audio work with several tracks in ANY program, not just BIAB, well, I better get at very least a 64bit OS and some good amount of RAM ... there's just no way around it. I can't blame the software companies making DAWs or program like BIAB if I don't have the very minimum tool for the job, right?
Again, I am sure there's a 1000 issues that I am not aware of
