Comment by culi

At least for academic papers, the network is still around but has moved to a more decentralized solution. Nowadays, the bleeding edge is a network of [mostly Telegram] bots that you give a doi to and they return your desired paper.

It's called Nexus (or LibrarySTC?) https://libstc.nexus/

It's very fast and efficient. I've never seen a bot get taken down either.