What ever happened to the mix-cd?

I wasn't really a huge part of the "Mix CD Movement" when I was a kid. I sort of caught the tail end of it, but by the time I was of an age to appreciate it, everyone had moved into the ultra-digital age. Recently, though, I swapped CDs with a good friend of mine. I gave her some excellent music and she gave me some excellent music. It was awesome. We rock out to each other's music now. But this swapping only happens once in a long while. Back in the day though, it was like a greeting card, and I guess people passed them out like crazy. I can see how they phased out, actually. The digital music phenomenon (at least with iTunes music copyright crazyness) makes it less convenient to swap bits of music. I suppose then that it makes these occurrences all the more special. Ah well. Maybe next phenomenon I'll be all-up-ons.