The "nothing to hide" thing is a bad argument, IMO. I've got nothing to hide, but I lock the bathroom door when I go in there.
Sometimes it's been useful to go back through a chat history and find something someone said in the past. A group I'm in regularly rings up old references from a year before. I like it.
I'm a bit of a digital hoarder though. I keep blurry photos from years ago, no clue why.
I'm kinda surprised this is so upvoted on Lemmy. The whole thing is literally just an excuse to draw some boobs. Weak humor.