BIAB drag n drop, drag n drop, drag n drop. . . . to main DAW, oh that don't fit will generate, drag n drop again. .
You can't really record in RB, it needs multitrack record arm for each track for selected input, and draw the wav while recording.
It needs more Node modes so you can still mix while parts are muted.
Yes going to 64 bit will help and yes more RT RD, if they just have DI guitars that will save a lot of space.
They will get there eventually as I said, but yea it takes soooo loooong.