The real problem is IPv4, and IPv6 overshoots. The ports wont be opened ubiquitely. UDP can only do (P2P) punch through and if one person uses the designated

The real problem is IPv4, and IPv6 overshoots. The ports wont be opened ubiquitely. UDP can only do (P2P) punch through and if one person uses the designated port on their IP, the next person to connect gets an elevated port number. It's janky, and you cannot guarantee QoS. Also scaling UDP server needs the same multicore cooperation as TCP. UDP solves nothing interesting. And now we are closing 25, 53 and 80 with ISP port blocks, anti-viruses and browser defaults. Good job humanity, closing the working door before you open a new window trapping yourself forever in centralized root-certificate hell. Flash and Applets got killed by locked down iOS and Android. The browser is now dead.