I installed cruise control on my otherwise primitive '65 Chevy station wagon. Loved it. I'm hard pressed to think of a drawback of cruise control.
But then I would say exactly the same thing about ABS.
The rest...I agree with you. Oh, except for electronic ignition -- my car starting problems disappeared when I started owning cars with electronic ignitions.
And I'm kinda fond of those lights that come on automatically. Not the ones that are always on, but the ones that can tell when it is a little too dark. Like when you go in a tunnel. I positively love that.
Oh, and automatic overdrive, "torque lockout" and the 3-way catalytic converters.
But yeah, old cars, that weigh twice as much as new cars, are the best! Trucks that ride like trucks? Man I miss those. My crap 2002 GMC Sierra, with that high strength steel? Too car-like for me. Who needs comfort? I want the smell of oil and the bounce of a bench seat.
Oh, and the rear-view mirror that shows the outside temperature and the letters I-C-E when it is near freezing? I hardly ever use that. Mind you, when it does get near freezing I kind of appreciate knowing there might be black ice.
But the compass direction indicator is a bit much. Except when I'm driving on an unfamiliar road, at night, in the rain.
So, yeah, you're right. Who needs anything better than a model T? Well, except for the time that hand crank broke my wrist...