Yeah I do, for example I constantly look up how to do percentiles in Vertica. Man I can never memorize these, so I have a KB of queries and imported most of them into Datagrip using live templates starting with '_' followed by name of database. Some of them are technical stuffs and some of them are business stuffs (like how to get this piece of info from the tables).

I have other KBs but yeah I agreed that I do not go back very often, maybe just in training sessions.