Do you remember me posting about G.ho.st about 2 or 3 years ago? It was a web-based service now referred to as "cloud computing". Their reason for shutting down the service is Google's Chrome OS. I'm posting this, because Shoe asked if "anything ever truly disappear[ed] from the Internet". Yes, it does, all the time. My old site: http://www.geocities.com/amoebios - gone. Not by my doing (or undoing) but because the provider decided to stop the service. (It's a more complex issue about several free webhosts disabling their free services because of too much abuse.)
Sure, there's the Archive and you can still find my site there (partially), but the Archive is not a wiki or search engine - lost information is lost. And making something open-source doesn't protect it from dust and oblivion.