I miss the days that when you opened the hood of your car and looked at the engine you saw the damn engine! Valve covers were in plain sight, as well as the power steering pump, ac unit (If so equipped), dip sticks (oil up front, tranny back at the firewall) alternator, spark plugs (when was the last time you were able to see those),radiator and fan, a few tubes perhaps, and some assorted wires. You get where I'm coming from.
You were able to address a problem with easy access because it wasn't blocked by a bunch of plastic, tubes, wires, harnesses, sensors and god know what else that was made to meet some damn government regulations that made you just slam the hood down and say the hell with it because you have to dismantle half the engine. If it wasn't for dayglo coloring of the dipsticks and filler caps you would never find them in todays engines.
I also miss those floor vents that were down under the dash that you could open and get a nice breeze from when the car was moving to help keep your feet, legs, and seat cool and refreshed. And bring back the small window vents on the front doors!
And lastly, probably what I miss most of all are those drip gutters that ran along the roof line at the doors around the windows. With those you could open the window when it was raining and the water wouldn't be flying back in your face forcing you to close the window. You could leave the window cracked open still back then and not get wet and get some fresh air.