> What's the drawback if we use something like this? Routing troubles? Speed? This problem is not one of technical difficulties. There are many protocols that

> What's the drawback if we use something like this? Routing troubles? Speed? This problem is not one of technical difficulties. There are many protocols that could be designed that are future-proof, efficient, etc. The issue is entirely social. Everyone needs to use the same protocol(s), so there's a HEAVY emphasis on 'if it ain't broke, don't fix it'.