That still leaves of the possibility of brokered standards. There are some personalities previously associated with the late lamented WPEN or WIP. Some have done brokered shows on some rim-shots and weak sticks around the region. They have small but loyal groups of listeners and advertisers.
Stations dropped standards because owners figured they could make more money doing something else. Given the current decline of AM radio overall, maybe some owners will figure that, no, they can't make more money doing something else - at least not any more and standards could get another shot.
The older audience is not oblivious to the AM band and are more tolerant of static. Besides the frequency range of AM is just fine given the frequency range of older ears, and older recordings made for AM play.
Also an opportunity for rep firms who can effectively sell to funeral homes, Medicare supplement providers, drug companies, lawyers suing drug companies, alert gizmos, fiber supplements, travel companies, retirement communities ... all those companies spending money on Cozi, ME, Antenna, and the rest.
Same applies to Real/True Oldies.