A lot.
Technology:
1. Cellular phones did not exist. Telephones had dials, not buttons. That's why they say "Dial 911", not "Button press 911".
2. CDs, DVD's, or computer wmv's MP3 or MP4 files did not exist. If you wanted to see a movie, you had to go see it at the movie theater. It would not make it to TV until years later. Music was either on 8-track, record, or cassette. VHS, Beta, and laser disc came on the scene in the mid 80s but you had to have a lot of money for that.
3. Cameras always captured photos on film. You had to bring your film to a film developer, they would send it off to a lab to get processed, then send it back. It took awhile and you had to deal with mistakes, like blurry images because the camera was shaky or a person was moving.
4. Computers were garbage and expensive. It didn't matter as most people did not know how to take advantage of the technology even if they could afford it, not even the sales people.
5. Video games. Totally awesome waste of time. Graphics didn't matter so much as the challenge and fun the games provided.
6. Bicycles. Kids used to cruise around the neighborhood on bikes.
Humans
1. Crimes against babies/toddlers. Weird crime that happens nowadays rarely happened back when I was growing up. Starving your baby, dropping a baby off in a dumpster to die, killing your kids, imprisoning and starving your child, shaking your baby to death or to severe brain injury, punching/injuring a baby or toddler, raping a baby/toddler (this is totally f***ed up s***) e.g.
Steven Smith Executed: Ohio man who killed, raped 6-month-old given lethal injection - Crimesider - CBS News
2. General volume of pro-gay stuff
3. Sexual molestation/abuse of children by priests/coaches/teachers/adults
4. Female high school teachers having sex with male students. This was like a fantasy of high school boys.
5. Number of obese kids is higher. There used to be the "one" fat kid in school, the block, the baseball team, etc. Now, it's like half the team are overweight.
Business
1. So many car companies, brand names have gone bankrupt.
2. It is cheaper for television networks to pay for reality shows because reality show stars are paid less than the combined costs for writers and actors. And, the general public love reality shows.
3. Trade imbalance in the US. The US imports more from China and other foreign countires than it exports. To be successful, you have to outsource labor to countries where labor is cheaper. Even the US is now a place that provides a low-income labor pool for cars. German and Japanese companies have factories here in the US.
4. Cost of some things have grown faster than inflation.
5. Stuff that has been rebranded/marketed to increase the price on an astronomical level. Like coffee. Why pay $3 to $4 for a cup of coffee? To get a Starbucks paper cup for $2? A polyester basketball jersey costs $300 just because it is the same version of what professional basketball players wear.
Sports
1. Professional sports was always big but it's bigger now than before. Athletes are now "bigger" than life.
2. Parents push their kids into sports earlier so they can become a pro athlete.
3. Sports betting is way huger. The Internet made this bigger, or a bigger problem, depending on how you look at it.
4. There are a ton more foreign pro athletes in US professional leagues.
A lot of other stuff.
Chinese take-out restaurant exists in almost every US town and city.
Psycho middle-income to upper-class white males going on a shooting spree.
The large number of internet forums that provide a pseudo community of people talking to complete strangers across the US and world.