Your hypotheses are all false. I partied harder than my parents when we were young adults, but they partied much harder than me in middle age. The decline in festive activity is observed in diverse data and began years before COVID.
The dominant politico-social order in the West has become Puritan in many respects, from drug use to purity of food to purity of beliefs. This may have something to do with it. Or maybe they have a common cause, like the declining rate of economic growth. Or maybe it's substitution of online activity for IRL activity.
The dominant politico-social order in the West has become Puritan in many respects, from drug use to purity of food to purity of beliefs. This may have something to do with it. Or maybe they have a common cause, like the declining rate of economic growth. Or maybe it's substitution of online activity for IRL activity.