It's pretty hilarious that the guy had this issue for a while, and not once thought about how does the car determine who is driving, and how it can prepare the seat in time.

You are assuming that he didn't know that and that it isn't a bug in the system.

True, I am assuming that. Other replies seem to point that way, but I am waiting for confirmation.

People actually use both keys simultaneously when sharing cars? I always consider one key as an "emergency" backup, and it is never used daily. The car is single entity, so one key is more than enough (for my use cases).

PS: also in my country it is illegal to drive without car ID card, which is also single entity and need to be exchanged hand to hand when car sharing.

I have a key attached to my keychain. My wife has a key attached to her keychain. People share cars.

they do when you can have a profile attached to the key and the car can have some configurations to that profile, mainly the seat and mirror positions if those are electrically adjustable.

On the other side, I had an audi that on top of 2 keys, it had a plastic key with a code that can be used to create a new key as the one that you must store in house and keep safe.

Some vehicles have parental controls where a key can be limited to a certain top speed and the car reports its GPS location when that key is used.

"works for me"