Well, there's no reason to fix it unless someone has a compelling use case. And there's never going to be a compelling use case built around it if it's not fix

Well, there's no reason to fix it unless someone has a compelling use case. And there's never going to be a compelling use case built around it if it's not fixed. And regarding the fix, which do you propose, change the spec or change the majority of implementations? It may offend the sensibilities but we're stuck with the current state of affairs for the life of TCP I think.