Car tech itch? I have a Volt "electric" car with an on-board gasoline powered electric generator range extender. There's so little to futz with that there is more "How do I sync my apple car play" "How do these wheels look?" "I just filled with gasoline last year. Why does the display say it's stale?" conversation on that forum than any real tech stuff. Boring!
I'm more involved on the RV camper forums. There's a bunch of different systems (water heaters, cable lift, AC/DC/LP fridges, sewage holding tanks, propane pressure regulators, shore power to battery converter chargers, electric brakes) that always need work.
Some bad habits are hard to break though, like lurking on Fred's.