[tepmoc]

SCTP works fine on internet, as long your egress is comming from public IP and you don't perform NAT. So in case IPv6 its non issue at all unless you sit behind middle boxes.

Probably best approuch would be is like happy eye balls but for transport. https://datatracker.ietf.org/doc/html/draft-grinnemo-taps-he

[simiones]

How many corporate or residential firewalls are configured to allow SCTP traffic through?

[tepmoc]

residential - not many. Corporate on other hand is different story, thus why happy eyeballs for transport still would needed to gradual rollout anyway.