In other words, when there is a serious solution to multihoming -- ie, being able to preserve a connection when using more than one IP Address -- it will likely work for IPv4.
Yes.. SCTP solves the problem for V4 and V6 (missed that bit last time).
That remains to be seen. The list of issues that SCTP has or at least seems to have is long. To name a few:
- increased overhead compared to TCP - requires significant changes from applications - no backward compatibility of any kind - source address selection problem isn't addressed fully, if at all
I can't be sure right now, but I also suspect SCTP could very well be vulnerable to some of the threats identified lately in the multi6 wg.