Blowing up the bridge makes tactical sense, they are just waiting out the American exodus from Kabul airport because as soon as that's done, their chances of getting US arms/ air support increases exponentially. Panjshir will be propped up as a regional counter balance to the Taliban, the border crossings to the north will be retaken with US air / SOF support and it's going to be a revisit to the late 90s. Panjshir is flooded with the 03 brigade of eastwhile Afghan SOF. Panjshir isn't going to roll over. Anyone thinking the US will just leave and not leave behind a foot print is foolish. Welcome to the forever war ladies and gents.