Four-poster beds with canopies.

Matchy-matchy draperies, wallpaper, carpeting in every room.

China cabinets in the dining room.

High-fidelity radios in the walls of each room. Saw that once in one of the richer towns in the SF Bay Area. Thing is that they were all early '60s models and by the '80s they were dated and sort of beside the point.

I think hand cranked dumbwaiters are pretty much gone for good.

Popcorn ceilings.

Milk doors. Small doors usually adjacent to side entrances, where the dairymen would leave products.

Central vacuum.

I always thought there would be a clog in the pipe inside of a wall somewhere which would render the whole machine useless. I never had one but I had friends who did.

Interestingly, though, I'm seeing these videos on instagram now showing people using them and all the comments are like the people just discovered fire. "WOW!! What a great idea!! No more lugging a vacuum around. Brilliant!!".

Bright pink or turquoise or green tile bathrooms with matching tub and toilet and sink. Whole house attic fans that could suck all of the heat out of the house in minutes.

Living rooms with 1-3 steps down.
Decorative tile in bathrooms in god-awful color combinations -pink/black, etc.

Trash compactors were big in new $$$ homes when I was a kid. We were impressed when people installed them in their existing homes.

To show you how poor I grew up: fold away ironing boards. Ooh la la!

Knotty pine. Our 1950s house has Knotty Pine kitchen cabinets and flooring throughout. We didn't know about the knotty pine floors when we bought the house, as the owners had them covered with carpet. The floors were in pristine condition, as they had always been covered since the house was built. We kept all the knotty pine. One other oddity was every closet in the house was cedar-lined.

Phone nooks.

nakedonmygoat: My house has one. I use it for knick-knacks.