The big advantage of America NOT going digital years ago is that we have the benefit of a much more efficient, better sounding codec...hdc, based upon aac+. DAB has been very popular in the UK (more digital radios are now being sold than analog, but a significant margin), but as they try to squeeze more stations into the available bandwidth, audio is suffering (with the mp2 codec). MP2 sounds AWFUL at bitrates much below 128kbps, but HDC can sound quite lovely at far lower bitrates.
Much of the world had digital radio before us. OURS SOUNDS BETTER! Japan had HDTV years before us. Their signal is analog, and noise-prone. Ours is rock-solid digital, and capable of stunning quality. Sometimes it's better not to go first.