> I don't remember comic books being "nerd" material before the 2000s (like say computers or computer programming)
I'm not sure how comic books got into this. But comics were definitely for nerds: basically, socially-inept people who did things like reading instead of going out to parties. Computers were not central to the definition of nerd.
Comics had quite a lot of breadth to them even before the 2000s. Consider Footrot Flats, which no self-respecting city nerd from America would have known of, but which two generations of Australian and New Zealander farmers grew up reading.
I'm not sure how comic books got into this. But comics were definitely for nerds: basically, socially-inept people who did things like reading instead of going out to parties. Computers were not central to the definition of nerd.