In the mid and late 70s it was a different world. Not only all the 80/90s not there, as the other poster said, a lot of small town stations signed off at 10pm or midnight. From "the other Coldwater (OH)" I regularly heard Detroit (92.3, 98.7, 101.1, 103.5, 104.3, and others), CKLW-FM at 93.9 sometimes, 93.7 from Grand Rapids was pretty regular, as well as some of the other signals from Grand Rapids. I remember getting WUFM from Albion, WLEN from Adrian, WUOM, even DXing Traverse City once. WKQQ (then on 98.1) was a semi-regular.
Sometime maybe I'll do a "retro band scan".
The only clear commercial frequencies in Springfield OH are 93.9 (mostly get Wild 93-9 in Lima if any tropo at all), 105.3 (mostly I'll get Lafayette or Mansfield). 103.7 was usually WCKY-FM (what a signal) if the band was open, it's covered by K-Love now. 103.3 was good, with Indianapolis, Ashland, Ky and St. Marys OH fighting it out, but I still heard Kalamazoo occasionally. 98.1 will still get Lexington or Defiance most of the time if I'm far enough away from the University of Dayton translator. As was said, it's on;y gonna get worse.