Tbf that's the matter of taste/preference. I'm have the completely opposite view to yours - I'm really attached to old vids, drawings, texts (that I made myself when I was younger). So I store and backup everything, even things most people would think of as unserious/unnecessary. It feels like a part of myself, a part of my story, you know, so I would be very upset if I lost it. And I can understand if someone have attachment to old films, books etc. I would say archiving old stuff is kind of a hobby in itself.

Although that being said, I can see advantages of your style - mainly less spending money on harddrives and time of setting them up and backing up stuff :)