The Past 5 years

The very best stuff has changed little. It is the low and mid level equipment that has markedly improved. This is bad news for high end dealers because their costly products, even if they are the best, are harder to justify to the majority of buyers.

redbook cd's..........even on the earliest hardware, the the newer cd's are pretty good. still no vinyl, but pretty good.

Digital advances, especially in the very hi end cd players, seem to be closing the gap between analog and digital. Playing cds are getting closer to sounding like vinyl. Not there, of course, but the gap ain't no Grand Canyon anymore...

In digital, the high-end stuff has actually changed a great deal in my opinion.

I vote digital!

I'd guess digital, especially in amplification.