[rom-antics]

If I understand you, if the URI database outlives the URI itself, the URIs in the database would still be useless, right? If somebody buys uber.com, it does not matter if we preserve "uber.com/xmas-sale", since the uber.com domain can be pointed at a different server. So you need to save the content as well, which means you'd need something like IPFS. I could see the usecase for something like IPFS on a blockchain (assuming IPFS is not working well enough as is; I have no idea)

[JohnFen]

I think it would not be controversial to say that a blockchain would not address most of the problems IPFS currently has.

Just to avoid misunderstanding -- IPFS right now does work pretty well, but there is plenty of room for improvement.