Inspired by the post about the hieroglyphs the one dude hoped would last forever.
People always talk about future historians being confused at memes and old forums, but surely a lot of catastrophic events could just wipe out the internet wholesale, right? If something REALLY COOL 
like a giant meteor wiped out everybody, what if aliens came along and were deeply confused that our culture seems to end randomly in the mid 2010s, subsumed by an internet whose only remaining shreds are references in big scientific studies?
The history textbooks on our dumb asses would surely read "and the humans all talked into screens and used "hyper links" to share information and opinions. Very little is known about this obscure human ritual as no evidence can be found of its existence beyond scattered references in ancient texts contemporary to its existence."
Thinkin bout the impermanence of the internet rn
A solar flare would take out a massive amount of electrical infrastructure, on one side of the globe anyway. But a large portion of datacentres are shielded because putting in a bit of extra wire is a pretty small cost for a big benefit. So a lot of power/comms infrastructure would need recreating, but again, most of the data is unlikely to be lost.
It only takes one archive.org-type datacentre to survive to restore everything of any significance, and there are a fair few of those around.
Boooooo!! Death to the internet!!