So in other words most here agree that the war is lost because its objective of a stable, power monopoly central state that keeps AQ out won't happen?

A victory (using unaspiring definitions of victory that I usually don't share) would then only be possible if the very goals of the war were changed by our governments (especially deleting the "secular" and allow sharia - you know that won't happen).

What's the difference to just leave and let the civil war parties fight on, supporting the non-Taleban civil war parties along the late 2001/early 2002 invasion model?
It's not like all warlords had disappeared, after all. Afaik they're just saving their forces for the final fights after the Westerners left, just like most militias in Iraq do afaik.