For some definition of "reliably". In the sense that nothing is really reliable in the presence of state-level adversaries censuring traffic, malicious ISPs, a

For some definition of "reliably". In the sense that nothing is really reliable in the presence of state-level adversaries censuring traffic, malicious ISPs, and crappy hardware. In general I have been more successful with QUIC hole punching than with ipv6. But having a standard and relatively broadly implemented way to make reliable "TCP-like" streams over UDP is a great thing regardless.