Oh, for me it's the opposite way. I've never had problems with AUX, the cable was always there in the car and I also used to always carry one with me.

When cars started having bluetooth, the aux port disappeared, and I never managed to have the same experience of just "connect and go". Sometimes headphones take over your bluetooth mid drive because the lid opened accidentally, sometimes it disconnects for no reason at all. If someone has google auto connected, nobody else can connect the bluetooth to play their music. And it drains battery way faster than AUX.

I wish cars included both options, but for some reason they completely forgot about the AUX.

I've never tried the controlled temperature seats though, I'll have to try those. The idea certainly sounds good.