72Mhz. is OK at our field because all the new guys have 2.4 radios. Plus we are far enough out in the country to avoid interference. I have both, but I am transitioning as things wear out. No point in getting rid of good equipment. I have been flying long enough that I occasionally try to pull the 2.4 antenna out before flying. Preflight! Preflight! Then check one more time. ;-)