It seems pretty obvious to me that this also existed in older times. It's a pretty well established and reproducible big five trait. There were always people who were lone wolf types, not necessarily hermits but people who like to be alone.
Ask your parents, it was certainly a thing in the 80s too. Even if I think about my grandparents, they didn't constantly have others over. My grandfather was a chill village guy who liked to spend time alone, working in the garden, working in his shed etc. But there were more regular externally forced events, like big weddings, gathering for a pig slaughter, coming together to renovate the house etc.
What changes is the tradeoff threshold.
Now, being alone is more attractive to more people than before. Some liked being alone even in the times when it just meant books or doing some loner hobby like gardening or woodworking or whatnot. But with Netflix and YouTube the tradeoff shifts. Also as people get more flaky, socialization is even mharder, making people more flaky.
So introverts existed before but today mild introverts may act more introvert-like, who earlier would have preferred to err more on the extravert side.
Ask your parents, it was certainly a thing in the 80s too. Even if I think about my grandparents, they didn't constantly have others over. My grandfather was a chill village guy who liked to spend time alone, working in the garden, working in his shed etc. But there were more regular externally forced events, like big weddings, gathering for a pig slaughter, coming together to renovate the house etc.
What changes is the tradeoff threshold.
Now, being alone is more attractive to more people than before. Some liked being alone even in the times when it just meant books or doing some loner hobby like gardening or woodworking or whatnot. But with Netflix and YouTube the tradeoff shifts. Also as people get more flaky, socialization is even mharder, making people more flaky.
So introverts existed before but today mild introverts may act more introvert-like, who earlier would have preferred to err more on the extravert side.