I think that's definitely a contributing factor, along with reduced face to face social interactions in everyday life giving people less of a baseline to work off of.

Back when I was in highschool and college (mid-00s to mid-10s) I could usually clock very quickly who had been a shut in nerd mostly watching shows, and sometimes even the specific shows they had watched, by their mannerisms.

Decent amount of manic aggressive girls who learned from that horrible anime archetype (cat princess from Outlaw Star, derringer girl from Trigun, many tsundere characters). One guy I know was pretty much directly emulating Church from RvB. Another guy that was Spiderman and Goku. Usually my gut feelings checked out later when we'd talk about favorite shows and such.