I blame a lot of the de-socialization on our constantly connected society. Since everyone is in contact with each other 24/7 via social media the idea of meeting random people is less exciting. The 24/7 news cycle also injects a lot of doom and anxiety making people more aware of dangers - intoxicated driving, overdose, violence, rape, etc. Parties might be viewed as more dangerous than exciting. Now add to that, 24/7 streaming of TV and highly addictive video games. There is plenty of distraction to fill the boredom gaps that used to motivate people to go out. And finally, I think covid drove a lot of people into a more isolationist mindset. I know a few people, including myself, who have admitted they go out far less post covid compared to pre covid.