Neat. This FS is used predominantly in torrents of pirated steam games by a certain group that advertises their work with "play without extracting".
This kind of feature is really important if you to encourage people to seed even after their download is completed.
Since ipfs is content-addressable storage, it's readonly. If we make it cow, encourage people to seed is easy.
And then they announced they will willingly and proactively delete any hash that any legislative agency tells them to, and it was dead in the next minute.