Just a bunch of idiots having fun: a photo history of the LAN party
Gaming companies contributed to the death of LAN parties too. They killed the "split-screen" gameplay that would support 2-4 players on the same machine. They wanted each player to require their own copy of the game. They killed LAN support, forcing you to play on their servers. Culturally we saw a shift towards social isolation. People are more comfortable talking over a mic.