This is a picture of the first HTTP web server in the world. It was Tim Berners-Lee's NeXT computer at CERN. Pasted on the machine is an ominous sticker: "This machine is a server, do not power it down!!". The reason it couldn't be powered down is that web sites on other servers were starting to link to it. Once they linked to it, they then depended on that machine continuing to exist. If the machine was powered down, the links stopped working. If the machine failed or was no longer accessible at the same location, a far worse thing happened: the chain between sites becomes permanently broken, and the ability to access that content is lost forever. That sticker perfectly highlights the biggest problem with HTTP: it erodes.
This is interesting, since the opening video for https://hypothes.is/ mentions the early web also - in this case, for its annotation features that were removed.
It seems to me that hypothes.is is even more powerful used on IPFS content identified by hash since that underlying content cannot change.
Thanks to both services I'm doing exactly this right now!