It has been said that most of today's radio engineers are "IT Guys and Board Changers". Very few know much about AM DA maintenance. Thus many DAs have been neglected. A good old fashioned radio engineer knew how to maintain them effficiently and cheaply. Now, with corporate engineers thousands of miles away, the go to way that large corporations deal with it is to go nondirectional Day and Night with 10-50 watts maximum Night, and sell the land if possible. If not, shut it down. We are seeing some of the best facilities shut down or seriously downgraded. Many of the old Clear Channel I-A and I-B stations have been downgraded. It all started with the sad downgrade of WOWO. Now that fate has reached WMVP, WSCR, and WBBM. What is also sad is to see 50000 watt stations with 99 or 250 watt translators, or Class A, B1, or C3 rimshots to simulcast on. The translators were supposed to "save AM radio", but they can only do it in smaller markets.
With all the 80-90 and subsequent rulings, rimshot drop ins, translators, and IBOC side bands, the FM band now reminds some radio people of "multiple CBers whistling into microphones on the same channel". No one can hear anybody anymore. IBOC should be called IBOTC, "in band on three channels".