It's hard to beat CDNs for streaming because the number of hops is low. Basically any p2p technology would have to mirror the way existing livestreams work; a local well-connected peer sucks down the livestream from farther away and rebroadcasts it to local peers. Anything else introduces latency or wastes WAN bandwidth. Peers are also rarely situated where they have moderate downstream and exceptional (local) upstream.
IPv6 multicast is probably the way forward for livestreams but I haven't really been keeping up on recent developments. In theory there could be dynamic registrations of multicast addresses that ISPs could opt-in to subscribe to and route for their customers.
hops and latency in general does not really matter in streaming context after the first few seconds, which are a bottle neck due to connecting to peers that might or might not exist
( not a criticism of you/your post )
it is insane to me, for people to have need to watch toxic channels like LinusTechTips livestream, regurgitating weeks old toxic marketing disinformation and having need to have that 0ms latency... XD
why everyone needs low latency for one way stream? unnecessary hurdle just to have that hurdle. no benefit to anything.
but agree with you that if companies already forget existence of IPv4, internet will be simpler, faster and more usable. for less price for everyone.