Re: best "to buy a really old car that isn't super-connected"
My current car is a change over model from basic minimum electronics to full on lots of them.
Lots of ECUs all doing different jobs, only accessable through an OBD styled non OBD compliant port.
It would be drivable with only 3 operating (security, engine, electronic automatic) but the ABS and suspension ones can fail but car still driveable.
I looked at the replacement models but put off by failing cranks, even more electronics with no manual way past (eg hand brake), and weight.
The latest keyless entry and starting does worry me a lot.
But almost all parts are still available. So I reckon this will last until I retire.