I wish I'd done that with a lot of the indie music and otherwise unpopular things I was interested in years ago. There's a particular album I wish I could find and listen to, but I've only ever been able to find one article talking about it, all links dead, and that itself was long enough ago that I've forgotten the name of the album and band.

I had a lot of things saved through Instapaper right from its inception, but I stopped using it regularly and one day when I went back I didn't appear to have anything saved anymore.

Since then, I've been much quicker to download things I might want in the future. Storage is cheap, archaeological effort is not.