I've been doing it since 2011 with ledger, so over 14 years! It's quite cool to see my finances over that time and reflect on it. I made a machine learning thing years ago to read my bank statements and categorise them into my accounts. I also have a few scripts for plotting it all with matplotlib, including an overall wealth plot which shows key life/world events for context. Can share these if there's any interest.

I'm now considering combining by finances with my partner. It would make a lot of things easier. We'd get paid into a joint account and then pay ourselves into individual "spending accounts" according to our budget. Anyone have any experience with this kind of thing?