It's going to have to be finally accepted that any less than thousands of American's left in Afghanistan should be considered as a miraculously successful evacuation. This situation was much worse for the losing side than was the Vietnam evacuation which was still under the south's control.
An interesting question is: What has Trump/Biden been talked into agreeing on with the Taliban, and is America renegging on the agreement and causing the Taliban to pause aircraft departures?
Are you nuts ? A successful evacuation is when EVERY last American, every last friendly Afghan, and every last piece of American equipment has been evacuated. I would add to that massive amounts of rare earth minerals, to keep them from being given to the Chinese, and because we need them ourselves.
Actually, what would be "successful", would be to
not evacuate at all, add many thousands more US troops, not give up Bagram airbase, knock the hell of the Taliban, turn Afghanistan into a US territory, permanently securing it from Al Qaeda, ISIS, et al terrorists, and keeping US troops close to Pakistan, to be used in case the Paki nukes become endangered.
This option is still available to Biden, although the chances that he would engage in it is near zero, since he is so intent on keeping troops out of the country, even to the point of abandoning Americans, and billion$$$ of equipment. This is what happens when you put a nut case in the White House.