Although I prefer a bit more federation - maybe like DNS - overall the idea is really cool! One other downside: what if the owner of a shared file passes away,

Although I prefer a bit more federation - maybe like DNS - overall the idea is really cool! One other downside: what if the owner of a shared file passes away, or a worker leaves the company, etc.? I guess if the file's that important, then I would have to have downloaded the file ahead of time, and hosted it on "my upspin"? Not saying this is an easy thing to solve for...but maybe ipfs at least addresses that...unless I'm missing something, and upspin does accommodate that use-case?