IPFS is heavily used for NFTs.
Imaging paying for artwork and not downloading a copy because you think it’s archived. Poor art buyers.
I guess the magnet link still has to ask a tracking server that knows some peer addresses already right? Whereas an ipfs node can dive into the DHT and start searching for a peer?
Perhaps the key difference is that torrents (targets for magnet links) can't link to other torrents, at least not in a way the protocol is aware of. Each torrent swarm is something of an island. IPFS is more like one big graph ("web") of documents/files.