I mean the optimal cdn is maximally distributed to reduce load and latency right. Unfortunatly the web was not built in a manner that supports this.
Eg if we could have a single url for the same object that could be served by any server that is part of the fediverse then the fediverse itself would be an optimal cdn.
Perhaps we should take some notes from peertube. Plus more legitimate bit torrent content on the internet as a whole is hardly a bad thing make the isp’s jobs harder for places without net neutrality.