Libgen still uses torrents primarily for preservation. It also hosts on IPFS but that is more for access, and there are very few IPFS seeders.
We tried IPFS for a bit but found it not stable and usable enough for preservation purposes. We're closely watching IPFS development and hope that it will get there, since it would be wonderful to merge the preservation and access use cases in one system.
Libgen still uses torrents primarily for preservation. It also hosts on IPFS but that is more for access, and there are very few IPFS seeders.
We tried IPFS for a bit but found it not stable and usable enough for preservation purposes. We're closely watching IPFS development and hope that it will get there, since it would be wonderful to merge the preservation and access use cases in one system.