Yes.. I had a 1986 BMW that had central locking, electric windows, radio, power steering, cruise control and a thermostat (which, as OP said, mechanical anyway).

No microcontroller on that car[1]; it was a very reliable car too (bought it with 50000km, sold it with 270000km and only ever did services. Nothing broke in that time).

Bosch k-jetronic fuel injection, no microcontroller needed.