Many are pessimistic, but not a few are optimistic that the Taliban has changed.  Russia even sees a "more pragmatic" face from the Taliban, unlike when they first came to power in 1996-2001.
The Taliban themselves seem to have learned from past experience that a pluralistic country like Afghanistan needs reconciliation and inclusivity to end divisions in order to unite and advance itself which is a much tougher task than a military expedition.
Because history proves winning the war is easier than maintaining the victory.  Britain, the Soviet Union and the US easily took control of Afghanistan but they could not manage the victory and were eventually forced to leave in a disgraceful manner.