I am still on a very old version of logseq. Why update?

Significantly better performance if you have a lot of notes. Better sync if you use that.

NewTags is pretty sweet: https://discuss.logseq.com/t/introducing-newtags-with-exampl... <-- MASSIVELY improved my meeting notes.

Bunch of reasons.

You don't have to, though. If the old version works, just keep using it :)