The next step would be instance agnostic content links. Could probably keep it so instances still serve images/link content but instead of sending out the raw link to clients send em a "lemmy link (https://instance/link/hash" that redirects to the og link where the hash is a value in a DHT for bittorrent. This should avoid breaking most clients while also letting the client bittorrent the content distributing load.

U could also probably create an option to then use this to serve caches/archived pages instead of the originals making lemmy and the associated distributed torrent data an internet archive of popular links.