ORIGINAL: Stick 40
I think the 2.4 has made the 72 band more usable because it takes planes off the channels they use. Less waiting time for a pin. That can't be all bad, if half your club goes 2.4 thats great.
That's how I feel about it. Less time waiting for my pin.
Maybe in 10 years I'll switch but I have no plans to do so now unless some mandate comes along. I have no gripes with the 72 frequency. Certainly nothing that would justify buying a bunch of receivers and scrapping my perfectly good ones.
Heard of a modeler (someone spoke at our club) who inadvertently hit the "Off" slider switch instead of his trim switch. He immediately switched it back on but the 2.4MHz initilization process took longer than the remaining duration of his flight.