I am aware "Sidewinder" is the family of missiles. Since this family is available since 1950's it is imperative to know which era does the missile belong, to find its actual capabilities. For instance Ancient Sidewinders (
9B, 9D,9E,9H,9G) and Newer Sidewinders (
9J,9L,9M, 9P-4-5,9R,9X)
While really old sidewinders (from 1950's and 60's) could hardly be called any threat/danger in present scenario, owing to there propensity to lock even sun or clouds.
Even "
9L" was introduced in late 70's (more than 35 year old design) and have plenty of shortcomings (like absence of Imaging Infrared camera, susceptibility to counter measures, absence of smokeless propulsion motor)
AIM-9X Block II is the most potent weapon present in the entire US arsenal (A2A weaponry) and in view of the present state of relation which Pak shares with US, it could be assumed they wont let PAF come anywhere near it (even if the relations improve somehow it remains to be seen if US planners would take the risk of Chinese coming and examining it)
Say what you have to say and believe what you believe, but F-16 is a weapons delivery platform and its effectiveness is depended on the potency of the weapons carried.
While a F-16 with AESA (and other passive sensors such as IRST, RWR, MAWS, ECCM etc), AIM-9X and AMRAAM 120D could be a nightmare, but F-16 with MMR, AIM-9L and AMRAAM-120C5 is a mere threat and nothing else. And a F-16 with neither Sidewinder nor AMRAAM is a joke(bomber)..