When I look back through mine, it tends to be for projects I worked on ages ago or to find some obscure app or file I know I had a copy of at one point and has good chance of sitting somewhere in my labyrinth of old system backups.

Not strictly useful I guess, I think there's value in being able to engage in one's old projects more deeply than screenshots can allow. It can be a bit of a trip to look at code I wrote 5-10+ years ago.