The idea is to save all messages and have a good search option, so you'll only ever see the good posts when looking back into your history. No need to tag them beforehand.
Honestly I don't want all messages saved. I don't see that as useful. Not only is that noise but just makes me feel uncomfortable in the same way I would if someone pulled out a tape recorder while we were shooting the shit over beers. Then you think about how cultures change and people make a fuss over things from years ago on Twitter even when the person has changed opinions? No thanks. Not everything needs to be recorded. That's the premise of too many dystopian sci-fi stories.
You can simply keep those messages in an encrypted backup. Who knows how valuable they will be in 20+ years. And maybe you will be able to apply (local) AI to them and find out interesting things about yourself.
