It's even more pronounced in the jazz world. FOr illustrative purposes I give you the "compilation" section of the Chet Baker discography on allmusic.com. Keep in mind that Chet died (a mysteriosu fall from a window in Amsterdam, no less) in 1988. Ridiculous! I am as big a CB fan as you're likely going to come across, and I would recommend "must haves" at about 3 records. I don't really understand how multiple labels are able to access / issue the same music time and time again.