People always confuse 'writing the standard' with 'making people
change their code or server'. What we write as the standard for HTML
2.0 won't become the standard for at least 6 months. We *don't* have
to include the transition plan in the same document that includes the
standard. We're not "destroying" interoperability by writing down a
standard that we think is the right thing to do, especially if we
think there *is* a transition plan.