Remember the 90s? You're waiting in a parking lot to go caving. "Where's Will?" "I don't know." "Call his house, there's a payphone over there." "His mom said he left 30 minutes ago." "Well I guess we'll just wait for him."
Today we can use speech-to-text to quickly tell people we're running late, organize impromptu outings very quickly and probably end up hanging out more. Even those with families and kids probably find it easier to organize events with other families thanks to shared group chats.
I wouldn't be surprised if these two things aren't really correlated and part of me wonders if our interaction may have gone up and our loneliness also gone down. If that's true, it could be more of an indication of us not _really_ talking to one another. Maybe there is less we can say today, or there are other factors that, in the age of acceptance and commodified outrage, make use feel more isolated.
A find thought, another really big factor should be online dating (Tinder, OKCupid, Grinder, POF, etc). Are people romantically lonely? Do average individuals have a harder time now that everything has been reduced to an image? I personally have observed that online dating really only works for attractive people, and for everyone else it's pretty much a wasteland.