I've made the switch to SS on my cars, which was easy since I only have a couple. Now when it comes to planes, well I'd have to switch out 15~20 RX's, some of which need more than 7 channels. 2.4ghz does prevent shootdowns, but my feeling is that the band was choosen due to FCC regulations and low cost, easily available 2.4gHz modules made for modems, wi-fi etc., though this is not true of Futaba, and dealing with multiple antennas, albiet very short, necessitated by directionality and blocking issues. Also, the skeptic in me wonders where all of this will be in say 5 years, when as we see more and more things using 2.4gHz (I'm not talking just r/c here). Remember phones on 900mHz? Don't get me wrong, like I said I've made the switch in my cars, but my "old" 72mHz equipment is reliable enough to make it hard to justify going out and spending a grand or two switching out RX's right off.

BTW I do have a synthesized TX which allows me to pick any 72mHz frequency, allowing me to pick an open frequency. I though it would be a great feature to have but if someone shows up later the frequecy I've choosen for the day, a lot of times I won't switch. When I first started out, I was doing flight after flight, but have found that I enjoy the people at the field also, I've met a lot of good people sharing frequencies. As I've gone bigger (.90cu-in +), I find if I'm not pacing myself I can easily go thru a gallon or more of fuel in a day, so BS keeps me out of the poor farm also