You don't need heated seats, you don't need an electronic handbrake, you don't need your dashboard to look like an alien spaceship.
You need less moving parts to keep costs down and have less chance of breaking down. The only plus side of modern cars I can think of is better internal design making it easier. It's beyond me me why modern car manufacturers insist on adding tons of gadgets, especially ones that rely on electronics.
The only good ones I can think of is a parking sensor and cruise control. More tech just means more expenses and more things to break down. I would rather spend my money on a nicer older car than a brand new modern car. No need to overcomplicate things.