The Taliban is becoming stronger and stronger, US/NATO notwithstanding. IS is expanding. And the US is loud-mouthing about a possible 'surge'.
Bad idea.
Afghanistan will never be conquered/transformed. It didn't happen in the past 300 years and won't happen now.
The Americans need to think back to the Vietnam war; when the local population wants you less, than your enemy, you have a problem.
This was the scenario during the Soviet invasion and it is exactly the same now.