I also graduated in 1987, and yeah, cruising seemed to be a “thing,” but mostly only in smaller towns. In my hometown, the strip was Tastee Freeze to Dairy Queen, or Hardee’s to DQ, after Tastee Freeze closed. Endlessly. Weekend after soul-killing weekend. Because there is not a damned thing to do in East Bumfuck, Georgia if you’re a teenager and don’t have permission to go to the nearest town with a movie theater or arcade or skating rink. (Back then, that was 45 miles and two counties away. My same-age cousin stayed in that town, and that was literally the only entertainment when I’d go visit for a weekend.)
When I was in my early teens, we moved to a slightly larger college town - still largely rural then and now. Lots of us had cars by 16 or 17, and our kids still do - no public transportation, so it’s either your own (parents’) car, or a chauffeur. (It’s impractical to ride your bicycle 12 miles into town, especially on the dirt roads.) Back then, there was some cruising around here, but not a real “strip.” A lot of people around my age would, however, meet up and hang out at the KMart or Rose’s parking lot, to socialize, or show off their latest automotive modification, or such. But we were just as likely to meet up at the movies, or skating rink, or bowling alley - because those were actually options!
Today, I’d guesstimate that 75% of my kids’ peers have drivers license and a vehicle by the age of 17, but they don’t cruise. With graduated licensing, those cars and permits are mostly for school, work, and making Mom’s life more convenient (“Honey, pick your sister up from ballet at 4:30, and bring home a gallon of milk.”) (And yes, school buses are available. But by junior or senior year, it seems like the vast number of kids I know are joint-enrolled at one of the local colleges, working after school, and going to some extracurricular activity at least a couple of days per week. Easier to teach them to drive and provide some vehicle than driving 400 miles a week for Beta Club, a college sociology class, soccer practice, and 10 hours per week of bagging groceries at the Piggly Wiggly.)
They still socialize - in person and on phones and other devices. Just mostly not in cars.