You cant bike around town safely anymore because a lot of the empty land around town was developed and now has a lot more traffic. There are several crosses on the side of the road dedicated to dead cyclists.
The trees that my friends and I used to play on at school when we were kids are fenced off.
The lake that my grandfather and I used to fish at is now off limits because it was choked to death with algae due to fertillizer runoff pollution.
We didn't need to have active shooter drills, metal detectors or safe rooms in school.
The cost of housing has more than doubled adjusted for inflation. Wages have not kept pace.
When I was a kid, the bullying stayed mostly at school. Now bullies can torment you 24/7.
Embarassing moments live forever because the internet never forgets.
In the early 90's Dan Quayle was roasted for "correcting" a child's correct spelling of potato. Now we've got congress critters running around that are worried about "jewish space lasers" starting forest fires.
LAN parties and split screen gaming died with a wimper. Singleplayer only games require a constant internet connection. Games are often a buggy mess at release because they can be patched after the fact.
Malls are basically dead.
Before cell phones, you weren't expected to be reachable 24/7. Hell there used to be "its 10 pm. Do you know where your children are?" commercials because kids and teens weren't kept on a short leash as much. Parents couldn't just call you wherever you were.