So your answer is: a free-for-all on the spectrum.
Radio broadcasters and equipment manufacturers have an incentive to cooperate on this.
The biggest and most powerful broadcasters, TV and commercial radio stations, have a strong interest in actively jamming their competitors' broadcasts. The same goes for mobile phone networks, it's in their interests to disrupt the operation of their competitors' networks.
At the moment, those activities are suppressed by authority.
Dual boot, don't switch.