It works great only for a limited number of use cases.

It's terrible for unpopular content, it is not immune to takedown notices nor is it very resilient in the face of a determined adversary.

Backing 'long tail' content with webseeds works well for Bittorrent.

...but that's the same as saying let's back the decentralized web with centralized resources erp.

Exactly. Which begs the question of why bother with the decentralization part at all of long tail / unpopular content?

That's what zeronet is for.

Could you expand on that?

Zeronet offers no anonymity, you have to use Tor for that.

Torrents work for content that is heavily seeded, but you also have a lot of content that has ~0-5 seeders with very bad bandwidth.

I don't see how IPFS tackles the problems of guaranteed availability and enough redundancy while relying on volunteers to mirror and serve content.

Also, if you want to DDoS content, it sounds like all you need to do is find the IPs of the nodes that host the content you want to target (which might not be many, and I guess become visible to you once you access/download that content) and knock them out

Unless I missed something?

Have fun when all your DDOS bot ips get added to null route on my ISPs level.

It's not like the grandparent is advocating DDOSing, he is just pointing out that doing so is trivial for less popular content. This is something that IPFS doesn't address, but that their marketing fluff implies would IPFS would take care of.

Good luck adding all DDOS bot IPs to your null route.