The beauty in the Miles sets wasn't only the music, but the packaging and the lengthy writeups that came with each CD. And this worked, for the average Miles Davis CD buying public in 2002...

I'm not sure this is the case now as there are only a handful of folks left who prefer to buy their music on CD's but I think there is a large enough legion of Prince fans who could make a traditional release financially feasible. I would NOT want to see stuff just compiled and released digitally. But that is my own selfish bias that digital releases perpetuate garbage, lazy music making as the product is more disposible than a traditional release.