Military sale did their part well and provided us the necessary influence, some of which still exist today. US lost in Afghanistan by appeasing India, Afghanistan would still be in firm control if we have not brought India there, insurgency if any would still be minimal. People in policy making circles probably underestimated this or took Pakistan for granted. No US administration wanted to be in this position where we are today, its a failure, but policy makers believe that the can afford this failure for the greater purpose of "Pivot to Asia".If the US realises it has lost its influence on Pak because Pak had other options, why would it see the need to leverage influence through military sales? Furthermore, exactly what has the US gained by influencing Pak though military sales? Nothing. It's lost in Afghanistan because of Pak policy. There's very little strategic gain to be had from Pak from the point of view of rh US, it's simply utilised what little it could due to Afghanistan and then turned its back on Pak, as it did in the 80s.
Going back to the point, Biden admin wanted a middle ground by having a staging location in Pakistan, it was a bit naïve for them to expect that they will get base for some vipers and zulus while Pakistan is fully committed to China. So yes, gist is that nothing meaning full in terms of big ticket military hardware will happen in next 10 years.