DAB is the biggest con around. Sound quality is worse than FM, coverage is patchy and the overall take-up has been much less than the greed of the government anticipated.
DAB+ would be a lot better, but can you see the government allowing another OnDigital-style farce by decommissioning the current DAB system, requiring everyone to switch to another standard?
For vehicle use, a European version of Sirius/XM would be the way ahead. But no doubt some copyright nonsense would prevent that....
Terrestrial digital TV is being introduced to free up huge swathes of prime UHF spectrum for the government to flog; they can damn well keep their greedy hands off the 20 MHz allocated to FM radio.