And to think that now the movie is 36 years old which is longer than the time that Marty and Doc Brown went back in time.
Good observation.
Now imagine if someone today wanted to make a movie with the same premise where a guy in a time machine travels back to 1991 and we see him act like the proverbial "fish out of water" as he discovers this strange new world of 1991.
It doesn't quite work does it?
Depends on where he's sent back. Say he arrives in Compton or Little Rock, well, he might be in store for a shock. Those pre-internet days were nice, but we had BBSs in 1991 that some of us frequented often.
What would be interesting would be to see a time traveler jump back in time and conclude, "The present sucks!" and they decide to stay in the past. Imagine the implications of how that might change time if the writers really ran with it.