@madu

india will have to quit because of the following reasons;

1] the strategic patronizer of india(u.s.a.)will not be there in afghanistan

2]taliban and typical afghan culture has no similarity with indian culture

3]pro-pak groups are strengthening

4]only key supporter after american demise would be afghan army who has no capability to snuff out pro-pak jihadi groups

5]there are a few deciding players in afghanistan;
a)hikmatyar b)haqqani group c)previous northern alliance ,s members like uzbeg,hazara,tajik etc. d)pashtun majority having close links with pakistani pashtun culture e)karzai

after departure of america, pashtun and deprived majority will reemerge under the flags of jihadis esp. pro pak hikmatyar and haqqani groups.

pakistan is dealing with karzai and if majority uprising erupts then karzai will have no option but to support pakistan and to neglect india.
---for the 1st time pakistan is dealing with dostum and other ethnic groups for future set up.

all above scenario is extremely uncondusive for india to materialize her
designs in afghanistan.
so,
----no indian soldier would be secure in qandhar and other areas where they are present now a days.
----their contractors and investment will be insecure than ever
----the pro-pak elements will never allow 17 indian counslates at pak-afghan border to work any more.
-----above report in this thread shows how active lashkar e taiba is in afghanistan against indians.

that,s why, the only choice for india would be to leave the soil with pungent memories of the end game and that of the carnage upon her gigantic-dreams.