This is ridiculous. So basically, you don't do something, so why would anybody else do it?
Just talking about music, I have a 47.62GB iTunes music library, vast majority at 128 or 160kbps, which I plan to upgrade gradually by re-ripping my CDs. 6.70GB have no plays at all, mostly old stuff that I listened to a lot on CD years ago that I haven't gotten back to recently. But looking at those albums now that I've sorted by play count, it's reminded me of a bunch of stuff I haven't heard in a while that I'd like to hear (and am playing now!) I'm 28, and I have about 300 albums. Looking at my dad, he's got about 600 records and 300 CDs, I don't see any reason my collection isn't going to keep growing similarly. I can't help but feel like somebody who says this size of a music collection is "unreasonable" simply doesn't appreciate music as others. That might sound shallow, but simply put, a big collection suggests a broad taste and enthusiasm to keep hearing new things and desire to hear them again.
All that through the headphones, I'm not even talking about how to make use of that big new screen!