This is big news. If Germany, the biggest economy in the EU, is calling for NATO to seriously reduce its numbers and role in Afghanistan - and to never commit itself to such imperial/colonial adventures again - it's hard to see how we could be entering anything but the end game for the Afghan War.
And while the war hasn't been as politically destabilizing as Vietnam, for a whole raft of historical reasons, it will nonetheless be a major blow against western occupation-style interventions. This is another nail in the coffin in the War on Terror, christened by Dubya back in 2001, following the program of those now almost-forgotten hawks of the Project for a New American Century.
America and NATO have been exposed as being, like the former USSR, lacking in even the power to crush an exhausted population and a not very popular (at least initially) insurgency led by a ragtag group of refugees and farmers. It's worth remembering that, at its peak, Britain was able to suppress multiple uprisings and even in its twilight years could still crush the Mau Mau rebellion in Kenya. Could this also be the beginning of the end of NATO?