One could also argue that if there were not a clear and obvious need as well as Demand and input from the guys who fly then 2.4 would not exist there would be no reason to have it. when I think about the difference between 72 meg and 2.4 I'm reminded of the difference between drum and disc brakes, yep the drum brakes would get you stopped but the disc brakes just do it a hell of alot better and without alot of the draw backs, all to often people will advocate things from the standpoint that their carcass isn't going to be sitting in it, additionally if the latter were true I can guarantee with absolute certainty that preflights would be 1000% more thorough, most of the preflights I see consist of turning everything on firing up the motor and wiggling the sticks to see if stuff on the plane wiggles as well then it's up up n away. Pre and post flights even on RC aircraft should be done from the standpoint of whether or not we would be willing to take the same representative amount of cold hard greenbacks and toss it in a dumpster and walk away.
I don't know about anybody else but concerning pre and post flight checks I go to extremes to make sure I'm going to get my investment back on the ground in one piece barring any poor investment choices made by my 2 ADHD inflicted thumbs which have been known to become disconnected from my brain from time to time LOL