RE: 72 radios
Been flying 72mhz for over 30 years, still do. Glitches are extremely rare as long as normal precautions are taken and you fly glow powered airplanes. Electrics, ignition systems on gas planes, poor installations, and poor maintenance are the root cause of most glitch problems with any radio system, including 2.4.
Depending on where you fly and the surrounding congestion you should have no more problems with 72mhz as 2.4.