Most American vehicles (Ford, Chevrolet, even Cadillac) still retain the electro-mechanical controls for the HVAC (buttons & rotary encoder with the seven-segme

Most American vehicles (Ford, Chevrolet, even Cadillac) still retain the electro-mechanical controls for the HVAC (buttons & rotary encoder with the seven-segment display within for temperature display) even in the 2022 revisions. These are highly reliable devices that use embedded software (think micro-controller or RTOS) to communicate simple messages between the various control modules. 20 years ago some of this was still done entirely in assembly language, the code of which was often documented in 1000+ page paper volumes that would make your average full-stack developer cringe in disbelief. It appears sanity has prevailed - though Ford sells some higher-end models that have adopted a Tesla-style large portrait display that includes the HVAC. I suppose when you need to sell shiny things to gullible people to move vehicles off the lot....