I think the ideal solution to this is hash-based addressing, e.g. a URL that's something like "hash://d480f3e...". Your browser would then use whatever backend

I think the ideal solution to this is hash-based addressing, e.g. a URL that's something like "hash://d480f3e...". Your browser would then use whatever backend service it wants to find and serve the content with that hash. This is kind of similar to BitTorrent or Filecoin, but the problem with them is that they're tied to the distribution medium. What you'd really want is something that can change with the times and isn't tied to any single backend. How to incentivize people to continue hosting the content is another problem, but I predict that it shouldn't be too hard because of the constant falling cost of storage.