Seems way more tractable to me than solving link rot in the regular web.
And then someone will have to put in the money to pin/host the content anyway if you want to keep it online.
Link rot is solvable with tools such as WARC Proxies.
You think these 20 people will stay offline forever?
Torrents die all the time because nobody bothers to donate bandwidth to strangers for content they barely care about.
How is IPFS different?