It’s not a big deal. My SO and I are very different heights (like a foot/35cm), and it takes all of 10 seconds:
- slide seatbelt adjustor up/down
- move seat forward/backward
- adjust mirrors
We do it like 2-3x/week, and as the taller person, I’m totally capable of doing the adjustments while driving out of the neighborhood. It’s really a non-issue.
My wife and I are just the right height difference that the little flicky switch on the internal mirror will swap between the angles each of us need.
One day we got a car that has some auto light filtering for night driving and it doesn’t have the switch. Can’t wait to sell it.
You could just replace the mirror, it’s not normally that difficult to swap out
When I drive my girlfriend’s SUV, I have to stand outside of it and work the controls until I’ve got enough room to get in. It’s not awful, but does kind of suck on hot summer days when I just want to be in the air conditioning.
Our old (2006) minivan has an electronic adjustor, so I just hold that down while getting in (butt in seat, press button, swing legs). Our other car (2007 sedan) is even easier, since I just tap the adjustment bar under the seat and it slides back as I’m sitting on it (again, sideways). Then I adjust the shoulder seat-belt just before grabbing the belt to buckle, then I adjust the rear-view mirror while checking as I back up. It’s pretty smooth and routine.
Our AC takes a while to turn on anyway, so I don’t expect any AC until I’m at least a mile or so down the road. We park in the shade (garage at home and work), so I don’t need the AC anyway when setting out.