ORIGINAL: Silent-AV8R
The other advantages of 2.4 in my view are:
Smaller more vibration resistant receivers
Far less prone to conventional RF interference (metal to metal, ignition, etc.)
ZERO chance of being shot down (it has happened to me twice - on 50MHz ham band BOTH times)
Also transmitters use less battery power to operate on 2.4 at least that is what I have noticed.