WebRTC uses SCTP over UDP, so there are Free implementations out there you can grab if you want to give it a try. It's a shame that the Internet has ossified to the point that we'll never have any protocols riding directly on top of IP besides TCP, UDP, and ICMP, but tunneling SCTP over UDP doesn't add ridiculous overhead.
Protocols that aren't HTTPS (like SMTP) are still alive. The reason for no new protocols is that some network infrastructure will consider non-TCP/UDP/ICMP packets badly formed and reject them.
Lol. Good one. These protocols are completely independent of the content that you can send over them.
For the most part they reuse TLS so the encryption is the same (and uses the same certificate authorities) so any man-in-the-middle proxies, like those used by corporations, are technically able to intercept them to monitor content just like they can for https. (Though personally those sorts of things make me feel ill )
Good luck banning these protocols as well. They're perfectly valid IP packets so identifying them is going to be hard.
