I think IPFS alternatives to the services below would improve their reliability, I would use them right now if they exist.
- IPFS alternative to archive.org and web.archive.org (Wayback machine)
- IPFS alternative to torrent trackers for pirated media, such as nyaa.si. The file transfers are decentralized but the content index (tracker) itself is centralized. Which is a pretty critical flaw, recently made apparent with RARBG's takedown.