You could be waiting a long time. A2A combat is largely a thing of the past. Aircraft are destroyed on the ground, wholesale. Much more effective than taking out 1 or 2 “retail” since aircraft spend most of their time on the ground anyway.
Even the F-15 only has around 100 A2A kills in almost 40 years of service. Most of those are Israeli. The rest are Gulf War with a few of those buy the Saudis. So there you have a huge investment in a pure air-to-air killer and you have what?
Not saying that it’s a capability that we want to give up, but the game has changed. It has been changing.
Fairly recently a couple of our F22 raptors took on two SU25’s that strayed over the no fly zone in Syria. Then an SU35 got involved and our 22’s ran all 3 of them home.