My home field is home to many drone guys, I would say they have world class equipment/knowledge all the way from illegal to professional broadcast guys (I fly in Los Angeles).

They too are on 5.8 GHz video with 2.4 GHz control, but many of the higher end guys fly UHF control links (FHSS at 433 MHz like dragonlink, etc). These systems have many many miles of range, while I think many of the systems we fly on 2.4 GHz are within a narrow margin of not working at ranges of <1/2 mile.

Some UHF drone guys are now migrating BACK to 2.4 GHz for the video link, as the propagation is better. This is a minor problem now, as most of them still use 2.4 GHz for control and the peer pressure is there to not slam 2.4......but it only takes one of them with a high gain 2.4 GHz video system to ruin your day.

The pace of hardware development around drones FAR outpaces traditional RC. They have discovered what many early adopters of 2.4 have known....it is certainly not the ideal frequency for radio control.

I think the jeti system on 2.4/900 is a great step, I think 430 MHz would be much better, in fact a super system would be if we could run spread spectrum on our old 72 MHz band. Huge range and really bullet proof

Lower frequencies are much better