Just to be clear, "TCP Sucks", despite successfully running the majority of the global Internet traffic. "TCP Sucks" so bad we're basically going to copy a lot of it: window based congestion control, SACK, timestamps, ability to add new options, etc. "TCP Sucks" because it is not perfect and has an issue, an issue that requires router / switch upgrades. We're going to fix that by breaking backward compatibility with _tons_ of applications and requiring an OS update on _every_ client and/or application. All this assuming our relatively new and unproven thing is as good as TCP in all other ways and fixes this issue of TCP perfectly.

Hmmm. Me thinks that TCP does not suck so much.