Leadfingers:-
When they are they are mostly using a better system that what we have on offer- which is too lo-fi and too crowded in bandwidth.
The solution is simple.
Don't buy a DAB radio.
There's no way that the BBC, or any of the commercial broadcasters would switch off the FM output if it would mean losing most of their listeners.
They can't afford to do it- they will not do it.
FM will be around for a long time yet.
Cheers
Dave