It's a good one too, opinion. I do have a lot of planes programed in my radio so I do have to change from plane to plane. Just like on 2.4 but the model match does keep you from taking off on the wrong plane. Lucky for me I am in the habit of checking before and after I turn on my planes. I have forgot to turn off my radio when going from PPC to PCM but then it's just like model match and my planes don't react or operate at all.
Why am I changing over? Because all my gear is getting old. In the past I have bought new receivers as they aged. Now I am just replacing them with 2.4 receivers. Other then binding I don't need to change anything in my radio. Ch 8 is still ch8, nothing in the radio changed.
I picked up a 2.4 module from Hitec when they were on a special sale for $20.00. Had it around for over a year before I got and used a 2.4 RX. Not everyone is young and working. Modeling money is very tight so I replace things when I can. Buying a new $500.00 radio and 10 new receivers is out of the question just to move into the new tech. I haven't had any of my students go into 72 but I have had friends see my module and change over like I am. If you have a good radio to start with there is no reason to have to buy a new one, the radios aren't really an upgrade and they will not create new brain cells. A brain fart is a brain fart no mater what type of gear your using.