8178 mentioned ...
The other thing to consider is that there is a lot of stuff that operates on 2.4g.
Well, it's not all going to be out at your flying field; output power levels are constrained, and the stuff you're thinking of is typically selected to one channel within the band. Futaba's stuff, by comparison, is the only true agile/freq hopper out there. Kudos to Futaba!
Mike