Quote History Quoted:
What's the bad idea? There isn't an equivalent replacement aircraft or the F-14 is gone?
View Quote
The F14 was an interceptor, it was really only meant to launch, get out as fast as possible (hence the Mach 2.4 speed requirement) engage the target and head back.
These days the Aegis missile defense system (and/or whatever it's supplemented or replaced with) pretty much takes care of that kinda stuff.
Things like the F18 and F35 can still intercept (except at lower top speeds) but they can also do a whole whack of other usefull stuff. I think the F14D in its later years could do bombing runs and stuff too.
When I was looking into aircraft top speeds, the Vietnam war they looked at hundreds of thousands of sorties and looked at how fast aircraft would go and for what reason. They number of times supersonic was used was in the low thousands IIRC and the number of times top speed was at or above Mach 1.3 was literally 3 times. They still kept speed requirements at Mach 1.6 as that's the fastest an aircraft ever tactically used in a Sortie in Vietnam era. Just in case. Most of the time when using an afterburner the jet uses so much fuel it kneecaps its combat radius, so most pilots only even use afterburners to reach higher speeds in incredibly rare circumstances.
Not such a big deal when an F14 was "intercepting" an enemy jet and only had to go a couple hundred miles tops, but when a jet is going from a carrier to land and performing strikes or CAS you need legs. The Mach 2.4 became completely irrelevant with modern SAM's, and with the lack of top speed the entire swing wing became completely obsolete. It's a ton of weight for very little usage. Even now modern fighter aircraft take the supersonic shockwave into account when designing the wings, so it's not a big deal like it used to be. Likely there will never be another swing wing fighter made again.