That certainly makes sense at an individual level, but it seems implausible as an explanation of the dramatic shift over the past decades from TFA, unless basic character traits have shifted dramatically over the past decades as well.

Character traits, technology, leisure time, have all changed.

It's not either or, it's all of the above: individuals do what feels good and if you're a great party thrower because it energizes you, you'll probably spread that influence some. And then possibly, the group reinforces itself by continuing to throw and attend parties.

At the same time, leisure time has changed: women work more, dads spend more time with kids, and the home offers a lot more easy entertainment that fits in with modern schedules. There seems to be less opportunities for parties with newer generations.

But of course, society seems to shun the party thrower because we're all busy. And so if nobody shows and the party thrower burns out, there's no influence spread. People dislike parties more and the idea reinforces again.

A mix of any of the above goes into our decisions about how to spend time.