Not the OP. But some of it also has to do with work life balance. If you dedicate yourself to the startup hustle there’s not really time for bars/clubs/libraries every night of the week. But for some reason staying up late, solving problems, eating with your coworkers, etc feels like a form of socialization. With COVID isolation, it just feels like a solo grind (I suspect this is part of why YC is biased against solo founders).