I don't know when they started (had to be fairly recently), but KTAR/ESPN 620 is now on KMVP 98.7-HD2. They were the last FM-less holdout.
So now we have KTAR on 98.7-HD2, KGME on 99.9-HD2, KDUS on 100.7-HD2, and KQFN on flea-powered 95.9 and 99.3. KQFN is a non-entity anyway, but even the little-used HD-FM should benefit the others, especially at night. HD-FM still has to have more listeners than Ancient Modulation, even with comparatively few receivers in the field.
So now we have KTAR on 98.7-HD2, KGME on 99.9-HD2, KDUS on 100.7-HD2, and KQFN on flea-powered 95.9 and 99.3. KQFN is a non-entity anyway, but even the little-used HD-FM should benefit the others, especially at night. HD-FM still has to have more listeners than Ancient Modulation, even with comparatively few receivers in the field.