If it has hit KING-FM, it will undoubtedly hit elsewhere in non-comm land. Some non-comms have a lot of infrastructure (translators, etc.) to support. The JPR network in Southern Oregon / Northern Cal comes to mind. Big network, a lot of stations, and low population territory.
It hit Vermont Public Radio early. Its local news and feature programs are still on its VPR News network, but its VPR Classical network's three local hosts were replaced by Classical24 programming early in April. Vermont is a small but mountainous state, and numerous stations and translators are needed to get programming to its cities and towns, most of whose residents are in valleys with severely restricted FM reception.