Adjustable tightness of part of the seat above your hips which keeps you better in tight/fast curves. Heating for cold starts. Massage for luxury. My BMW has it all apart from massage and its makes longer drives much more pleasant.
EDIT: It was still a tight fit for tall folks, though. In that particular car, the adjustment mostly helped short folks see better.
My 2010 Kia Soul has manual seats that can go up and down.
Although when the Kia Soul was first introduced, Kia threw almost every feature they could in it to win market share!
when I figured out what I had done I laughed at myself for a solid 10 minutes
YMMV, but I have no problem using mechanical adjustments. Power is no advantage for me.
Mechanical adjustment is fine for up-down, tilt (if it uses a dial), and lumbar, but for forward-back I prefer electric. Also because manual forward-back adjustments are very coarse.
They are fixed in place to a vehicle with a battery, still you don't have them powered.
Not that car ones (powered, heating, massaging, etc.) are not nice and comfortable, only that they remain a form of luxury.
I do drive cars, though, and sometimes other people's cars. I'd much rather be able to adjust while driving so that I can have better control over the car than have to fumble with levers, which might propel me back far enough that I cannot brake. Heck, I might have been having to adjust because I didn't realize how far i needed to press the brake in the first place.
https://news.ycombinator.com/item?id=29603532
Direct link:
https://www.thesamba.com/vw/archives/manuals/71bus/page1.jpg
Modern business and first class seats are indeed powered.