I was the 'coming-of-age-in-the-late 90s' teen and went to exactly 1 party. And it wasn't even the backup party, it was the cool kids' party. Outside of that I hung out with close friends and that was enough, I wasn't interested in parties.
We couldn't play any modern games, because every single person at the party would have had to have a Steam account or some license to the game, and have to log into it on my computers, then sign out when they were done... what a bunch of garbage. Nobody had their Steam passwords on hand.
With Quake3, you could sit down on any free machine and jump into a game instantly. I was also really surprised because some computers had the "official" Quake 3 purchased from Steam on Windows (friends who brought their own computers), some had the open source Quake 3 engine running on Linux, and some had official Linux clients... and they all worked together flawlessly.
Like, a movie party looks impossibly cool due to scripting and choreography.