"Closer to our times, in the Kargil conflict of 1999, we unilaterally declared that we would not cross the LoC."
Jaswant did this to win browny points from Strobe Talbott. It was not based on any reasonable decision making process after the war or strategic implications. It was all about pleasing temporary US State department faces; just like Indira in 1971 and Nehru in 1947 - let go part of J&K to please the UN mandarins, ignore national and strategic interests.
I am glad the army is holding its own on Siachen. But we can expect the same old silly politicians will want to curry favour with temporary western faces and let it go, all the while explaining away that how it actually in India's national interest. I am sure peaceniks will be happy to barter away more land to appease the terror demons.