I dislike almost all of the electronic features of my 2001 car.
I do mostly like having GPS, but that comes from my phone.
The bluetooth I had in a rental car was extremely annoying. It wanted to use a voice interface which didn’t work very well and wasted time and was annoying to try to use. It also refused to sync while the car was moving for “safety” reasons (even though it was the passenger doing it)! It also kept needing to be re-sync-ed, often failed, etc.
I’ve tried using cruise control but I don’t like it even for long road trips.
Separate climate control is ok but the driver-side down-temp button broke, making it hard to reduce that temp setting. I don’t see the advantage over more-durable physical vents like we’ve had forever.
I do think the butt-warmers on one car are nice enough, but not needed.
The alarm system was hyper-sensitive and needed to be disabled.
The high-tech high beams went berserk and it’d be $600+ to fix the “light control unit” so I had to disconnect the high beams – screw that!
The stupid sun shader things broke and had to be cut out.
The stupid smart key is mostly pointless and can run out of power and will be expensive if it ever gets lost or breaks – do not want.
The programmable chair positions might be ok but the interface is hard to remember so I never use it.
The auto-adjustive-reflectivity rear-view mirror is a joke especially as it has no manual tilt so I just get blinded by vehicles with high headlights and can’t do anything about it.
The rain sensor for the wipers doesn’t work well and so messes up the variable wiper speed experience, requiring more attention rather than less.
I usually disable the traction control because it mainly goes off too soon, sapping power and interfering with driver control.
The air bags that supposedly are making me safer have never been needed, but did get recalled because some of them were found to kill people (...).
Involuntary beeps when the car is unlocked.
Power locks and windows seem needless to me and have broken down on me several times, including cascading expensive and/or problematic malfunctions.
The cup holders are likely to drop drinks, and one broke.
In short, it mostly sucks and I’d rather it were older cheaper more reliable more controllable systems, or nothing.
I hate loathe and despise computers that track your positions and movements, or allow your car to be messed with over wifi, or where the computer can/will take over your car in some way (auto-parking, auto-driving).
Cars with always-on headlights also seem like a terrible idea to me.
Gizmos I like (or have liked in newer rental cars):
Power steering.
ABS brakes.
Cameras that let you see from your bumper so you can tell if you’re backing into something or about to scrape your front fender on a curb.
A good sound system, preferably with a USB port that can read MP3’s.