“The FCC this week released its latest totals. There were 4,730 licensed noncoms or “educational FMs” at the end of September,”

Yeah college stations usually just want local coverage. I don’t think non-commercial AM has ever been much of a thing. Among other things AM likely costs more to operate because of the higher transmit power required. Also, FM is better for music because of better audio. AM is fine for news, traffic.