J10c was a master stroke by paf. Even if iaf gets f35 from USA, paf will be able handle..... not 1:1 but will be able to handle. However with current political and economic crisis I highly doubt it is sustainable for paf to continue modernization and maintain this fleet.
My personal view
With change in order and change in Pakistan stance. Coupled with economic meltdown... China is at best delaying the delivery of rest of 30 examples