Actually, this discussion does bring up a thought. Could it be possible to have individual PPC emulation for the custom chips, then follow that with a new UAE? I.E., start with some of the parts rather than "Let's build a car." For instance, a PPC E-Paula would make a good choice, since Paula was a sound chip and should allow some kind of simple mod-player or the like to access it.

I do not know how well a planned path that would be, but hey it's an idea. I think the real question is how much backwards compatibility do we need V.S. how much catch up to current standards do we need?