Damn zumpp99, amazing collection there. How much is the storage requirement?
For myself it's 28,551 songs, 2170 albums, at a bit over 350gb. Mix of lossy and lossless. I've been a lover of music for a long time, but only recently got in to high end audio. I'm in the process of re-ripping/encoding/collecting about half my stuff that is pure mess of lossy junk.
Some of the challenges I face are things like bootlegs of a Pink Floyd concert that were recorded on cassette tape, and, uh, I don't own a cassette player anymore. I originally pulled it in at 128kb fraunhofer encoding (in, like, the 90s), so it sounds terrible. It might still sound terrible- I assume it was done with a recorder strapped to someone's chest at a concert.