> Yeah, I don’t think your explanation offers anything over and above what actual CDNs already do for us right here on earth

CDNs usually offer location-addressing, sometimes via different ways but most of the time boils down to "I have to reach that specific node to fetch this specific content". I'm not sure in what other words I could use to explain how content-addressing is different from that...

(not even talking about IPFS at this point (or in my grand-parent comment), it's just about URIs vs URLs in the end)

(edit: besides, the CDNs you're talking about are with 99% certainty using content-addressing all over the place internally)