Looking at NY Times topmost news, almost impossible to believe the Islamabad Talks failed because of Iran's HEU stockpile, because of the Strait of Hormuz status, and because of the frozen Iranian assets. All those three points were not even major factors in the so-called negotiations just before this conflict started on 28 Feb. The major issues then were, as should be now, the range and the lethality of the Iranian Ballistic missiles.
I call it BS the reasons given for the failure of the Talks!! And I even suspect the Talks really failed!