While my car still has a few more years until my country fucks me over for daring to own a 20+ year old car, I wonder if there's any car model left that doesn't have some onboard PC that interfaces with the engine (or really anything besides media plating) to control the car on my behalf or log every gas and brake control that dares to be too strong.
Define "onboard PC". If you mean no MCUs at all, you'd have to go back to driving something with a carb or mechanical fuel injection, both of which kind of suck. What I presume you mean is the insane retarded infotainment + always on phone home shit + aggravating touch screens and infotainment that everything ships with now. If you're in the US, I think we're kind of fucked, because good options like the Toyota IMV, which fits the bill, will never be available here, and things you could possibly get, like the Mahindra Roxor, are hard to make street legal, if it's possible at all in your locale.
Honestly, I feel (probably) the same way, but the best I have found to do is just keep rebuilding popular late 90s early 2000s vehicles, which is expensive and time consuming in its own right. I've got a handful of Toyota and GM vehicles of that vintage that are near or over 250k on the clock, and they're all in various states of me doing shit like rebuilding engines, transmissions, redoing interiors. God forbid you need paint, because that gets extremely expensive. Parts are also starting to get harder and harder to find for a lot of things, so I won't be surprised to be doing more fabrication for this vintage in the next 10+ years.
Maybe we'll get lucky one day and someone will build the anti-Tesla. I'd really like to own another new truck with crank windows, Porsche style door handle pulls, big engine, "old school" sequential port fuel injection, a manual transmission or at least a regular ass automatic that humans can service, a simple durable interior, etc.