In the short term you're absolutely correct. In the long term everything suffers from "data decay". It's just too hard to keep old files around forever. E.g.

In the short term you're absolutely correct. In the long term everything suffers from "data decay". It's just too hard to keep old files around forever. E.g. there were comments I made on Usenet many years ago. Google has previously attempted to preserve those, but they seem to be fading away into the ether. That's okay by me.