I've seen this rhetoric since Geocities. Discord is the latest scapegoat in a long lineage of successful products that are paradoxically ruining the internet and holding us back from the digital utopia we all dream of.
Thinking like this leaves out the most decentralized part of the system: people. People are the real repositories of lore, and they're the ones who bring the useful things from place to place. It's a mistake to ever think of the internet as a library. Libraries take the kind of work and time you can never expect at a massively distributed group of volunteers to do. The internet has been and will always be ephemeral.