Be aware that DAB+ is not the same as DAB, it uses far better, more modern compression so you get better audio using less bandwidth.
DAB and DAB+ are robust against multipath interference which means that you can have much more frequency reuse.
Wikipedia has a calculation for how much spectrum is used by one channel, comparing a 192 kbit digital stream to a typical analog FM station. The digital stream is about 3 times more efficient.
Of course you can try arguing that a 192kbit stream is worse than FM quality. But really it isn’t.
Yes it’s different, it’s annoying you need a new radio and sure, in 1% of all cases you get no reception where with analog FM you’d get some barely recognizable noise. But 99% of the time you get crystal clear digital audio, exactly as transmitted, of pretty high quality.