I've been working my way through Seinfeld, and I realized most of the plot lines couldn't have happened if cell phones were commonplace back then.
It’s also interesting to me that this problem, of storytelling in a world of instant communication, was first addressed in the original Star Trek. Various adventure story tropes had to be adjusted for communicators and transporters. Roddenberry et al admitted it was a headache sometimes.
A recent example:
George's GF wants a "no phones at dinner" rule. G: "We had a good thing going, Jerry! Now we're supposed to talk? That can only end badly!