I guess that would be me you're referring to
With today's sophisticated 2.4gHz computer radios (my brand of choice is Spektrum) I could run up to 30 models on one radio and yes they could be all on at once, but only one operational at a time, the others would just sit there & do nothing - not even a glitch.
The dozen or so different models are split up into 4 different radios,DX6, DX7, DX8 & DX18. Mainly so, when a radio runs out of charge, park that model associated with it & use a different trk or constr equip with a different radio to work at something else.
Thanx for your interest and welcome to the forum.
You have my curiosity, what farm toy forum is it you came from?