People have been claiming that over-the-horizon missiles will obsolete dog-fighting since before the Vietnam war:
https://en.wikipedia.org/wiki/Douglas_F6D_Missileer
> Through the later part of the 1950s and into the 1960s, military air planners increasingly believed that future air combat would be carried out almost entirely by long-range missile fire. This changed the basic requirements for a fighter design considerably. The pilots would be expected to fight primarily through their radar and fire control systems, hopefully never even seeing their opponent. Because of this, the emphasis was on "head down" combat and an all-round view was considered unimportant....
Not saying that won't eventually be true, but it doesn't mean it will be true any time soon. The lesson is to preserve the capability until it's actually been proven to no longer be needed.