I was born in 1988 so ...
The only thing I know is from television. Based on the television back then, some of it sucked. But some of it was much better than today.
There was still a lot of poor quality dubbed anime. They like to change things in the anime when they translated it. I gave up and decided to learn Japanese for the higher quality production design. There was Gatchaman dubbed (again) with very poor audio quality, Lolo changed his name to Scamper, there is this film called "Adventures of The Polar Cubs" dubbed by Doug Goodwin (a music composer who had a brief stint making Looney Toons specials in 1979.) I have not watched it and after hearing about "The Happy Song", I decided not to.
Velma and Fred went on vacation. This is because of casting problems but instead of put Scooby-Doo franchise on hiatus, they focused the spotlight on Scrappy.
There was an animation studio called Filmation that closed down. A small part of the reason is because it costed a lot of money to produce the cartoons. They decided to compete with Hanna-Barbera, who outsourced to Wang Film Productions Cuckoo's Nest Studio, while Filmation boasted "Made Entirely In The U.S.A."
After Chuck Jones made a "The Chipmunks Christmas" special, he basically retired. Alvin & The Chipmunks was produced by Ruby-Spears instead. Chuck Jones musician Dean Elliott went to work for Ruby-Spears. Chuck Jones and Dean Elliott are dead now.
All the super hero cartoons had a stupid pet monkey in them. Whenever you didn't have a monkey, you'd have some other idiotic character. He-Man, Thunder Cats, Centurions, Captain Planet (not a 80s show but still) ... all had stupid unnecessary monkey or monkey-like characters in them.
Michael Jackson was EVERYWHERE. (He's dead now.)
We had Mantenna, not Squidward.
There were many game shows back then. They slowly went away because of an increase of talk shows, and then another increase of court shows.
The game shows looked very futuristic. One production designer built the "Bullseye" set in 1979. He later redesigned another game show "The Jokers Wild". Betty White's then husband had a game show called Password which was on and off the air since 1961 He was named Allen Ludden. Other memorable game show hosts are Bert Convy, Jack Barry, Dick Clark, and Bill Cullen. All are dead now.
A very infamous game show was Press Your Luck, which was a revival of Second Chance, Second Chance. This new version was state of the art, equipped with a computerized game board with cartoon villains. Nobody cares about that. It is now remembered for a contestant who cheated. You can't search about Press Your Luck without a search tip of of the contestant's name tacked on. The game show host and announcer are dead too. (also, that contestant is dead).
In the beginning of the 1980s, Chuck Woolery was the host of Wheel Of Fortune.
There was this show called "The Cosby Show". It was about an upscale family. There was another called "Roseanne" which was about a family living in a cold little town in Illinois, hurt by the real world economic crisis in the 1980s.
MTM Enterprises was still around.
There was a computer company called Commodore / Amiga which was very popular in the 1980s. They immediately lost the competition in the 1990s.
In the 1980s, (and 1990s) the mac was not a PC.
Computers were much more interesting back then. They were not compatible with each other. (That was considered a good thing) But they were very expensive and portable computers were even more expensive.
Cable TV was around but there wasn't as many TV stations.
TV signals were "analog". There were VCRs, not DVRs.
The Internet, (the few who had it) was very expensive.
If I am Correct, there were no websites back then.
99.9% of Cameras were not digital. No camcorders were digital. They were either film or tape.
Color printers were very expensive.
There was few Wal Marts back then.
There were tons of other businesses which aren't around anymore.
Very few Public Transportation back then.
More "Import" cars began to be sold "domestically".
Not very many energy efficient light bulbs back then.
No iPod, no solar yard lights.
Yes, there was dry erase boards back then. They have existed since 1970. See Mary Tyler Moore (show) and Murphy Brown. They were there, hiding in the background.
The equivalent of text messaging or instant messaging was done on Teleprinters.
Everybody talked on the phone back then. They were these bulky land lines. And everybody answered the phone even without caller ID. There were pay phones back then. All of that must have been annoying!
Also, people did talk on their cell phones in their cars. (or actual CAR Phones)
Trucks and SUVS were UGLY.
Also, people seemed to have more hair back then.