But it still needs some sort of index to search for stuff, and torrents cannot change. It's a jungle of ever-changing forums and search engines. This makes it harder to pin down by authorities, but significantly reduces casual usability.
There are some tools to index the DHT, although it's limited. But that's more of a result of the regulatory environment and that it's hard to have decentralized search that works well.
There is a spec for updatable torrents, I believe it embeds a pubkey and the creator can announce an update by broadcasting a signed message. But it's not widely used.
