8ball
Decolonise colons!
I bought my car 5 years ago and I can adjust seat height, pitch, steering wheel angle, temparatue on different sides of the car etc but not the height of the seatbelt. If I make the seat high enough so that it isn't cutting into the side of my neck, it's a really uncomfortable (and rubbish) driving position. It would cost very little to make it adjustable but it's not considered necessary
I believe you get it on some cars, but its considered a "luxury" feature.
Until embarassingly recently I thought the little "switch" on the mirror was a "Mum/Dad" button, because the change in tilt in my folks' cars when I was growing up was exactly the right height to adjust it for their relative height difference.