"In 2009, Yahoo! succeeded in destroying the most amount of history in the shortest amount of time, certainly on purpose, in known memory. Millions of files, user accounts, all gone." - ArchiveTeam
Sure, most of those pages were crap. Yet...
A huge number of primary sources (mostly between 1996-2003), the Internet vernacular written by mothers, fathers, gamers, new-age hippies, gays/lesbian/trans, conspiracy theorists, Neo-confederates, etc, got steamrolled out of existence, replaced by... a mention in some Internet articles? Nothing at all?
Even though much of GeoCities ended up being archived, I doubt there are many people looking at it today. Now that it's all been swept out of sight, the history of the Web can be written to look something like this - how a few startups made the web "safe" for normal people, and made a lot of money in the process. Yeah, something like that.
(Ironically, these GeoCities "web pioneers" were considered part of the eternal September by an earlier generation of Internet users. After all, how hard is it really to sign up with a free host and bash together some HTML tags?)