Then they change the settings, and if they're a considerate human being, they change them back. If they're not, then you get to grumble a bit, change them back yourself, and consider not sharing your car with that person again. I don't think the world has lost anything substantial here.

Just realized I might be a grumpy old man.

> And what if you share your car with someone who prefers different settings?

There have been cars that change various settings depending on the key fob used ("hers and his"):

* https://www.youtube.com/watch?v=lSoJPgFSDOE

Before fobs, where you actually put the key in the ignition hols, there were cars with "memory buttons".

Spending 5 seconds changing the 3 settings that matter occasionally isn't a problem I care about.

Not being able to fix my own car because you've used space age technology to solve turning a dial IS a problem I care about.

Like in any modern analog car, the knobs are free spinning and therefore remember their settings. It’s a tactile version of tapping a screen that is a better UX IMHO. When my significant other uses my car, they hit #2 on the preset settings and everything slides and turns into place. This is a well solved problem and has been for many years. Note: I am a former P85D Model S owner.

Similar to the changing the seat or steering wheel position, except easier to dial it back.