After US defeat we can finally conclude that US policy in Afghanistan has completely failed. Their exit was disastrous for Afghanistan but we all knew it was going to happen one day. They spent 20 years in that country. A few more years wasn't going to change anything.
The only major mistake they made is they didn't put enough pressure on Pakistan. ISI were giving shelter to afghan terrorists in full knowledge of CIA yet USA didn't do anything about Pakistan. This is the major reason they failed.
Ironically in 80s CIA created Taliban to defeat commies now same Taliban defeated them. It has come full circle.
Pakis are enjoying this as a win. In reality they have made things worse. Their dream of central asian trade via Afghanistan will suffer. They also have an afghan refugee crisis looming. Islamic fundamentalism will increase in Pakistan. A stable prosperous neighborhood would've brought peace and economic opportunity for pakis but pakis being pakis they chose terror and instability.
Now its time for India to increase border protection and strengthen counter insurgency unites. Terrorism is going to make a strong return in various parts of the world including India.
It will be easier to exert pressure on Pakistan once US is out of Af-Pak for good rather than being dependent on Pakistan for their supply lines.
Nobody in the world or the US establishment has a fuckin clue why they came to Afghanistan in the first place.
To kill Osama? To rebuild Afghanistan? To root out Islamic terror? To get a foothold in Central Asia?
TBH, they failed in all of the above when their prime target lived in a garrison town as a protectee of their biggest GWOT ally, Pakistan and it took them nearly 10 years to nail Osama Bin Laden.
Looks like every couple of decades, US establishment decides to use war as an excuse to get ahead of its adversaries in the defence technology department, rework and refine its war fighting abilities with no intention of winning. They are more status-quoists than our Babus than initially imagined.