I've built something akin to this, but with the idea of applications distributing API`s where the databases are also torrented but working behind the api's, so that developers can build basically anything.

In my case i've implemented a new "browser" based on Chrome that allows this to work, without having to resort to browser-only infrastructure (for instance applications can dodge Javascript and also call RPC api's from other applications directly).

The applications and the applications data are distributed over torrent and managed to work together in the same environment as a flock where one app can consume its own apis and also the api's from others.

    service Search {
      rpc doQuery(string query) => (array<string> result) // the access to the sqlite db from torrents is encapsulated here
    }

The beauty of this design is that it can also be re-scheduled and have the same request routed to other peers

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