Pete, I won't agrue with you, It is odd. But nevertheless, I found it very useful. Especially for my usecase:
I bought recently a Saitek radio panel, using the SPAD driver. So it's very easy setting frequencies for COM1 and COM2, but I still need to reach for the keyboard, each time I wish to choose on which COM to transmit.
I had some free buttons on my Joystick and Quadrant, but very few, and I find a new use for buttons each day. In FS, there is different keystroke for each COM. Thus, I had to set two buttons for COM1 and COM2.
So I wondered, why do I need two buttons, when I can do the same action with one. And FSUIPC solved that for me.
It's extremely useful when flying VATSIM in big airports, where you have to go pretty fast through Ground-Tower-App-Center, and back when landing.
When i can do it without the keyboard.
I hope I convinced that my usecase is not that odd.
Actually I don't understand why Saitek havent put those buttons on the Radio Panel.
I tried using SPAD for that function, maybe use long press on ACT/STBY to choose that COM. But then, one has to choose a specific COM on the knob, and then make a long press. Reaching for the keyboard is easier.
Thanks again.