What is really unfortunate is that nobody in the US has yet followed the European model of doing a format nationally with one super production and running it in every market nationally.
Many of the European operators use online services to provide local weather for every location, as well as ongoing news updates and other services that are local or regional. Many also offer streamed format variants, like music by decade or era, feature artist days, all ballads, etc.
The end product is what I'd compare to the difference between local TV trying to do a late-night show themselves vs. running one of the "Big 3" network national show with guest stars. Radio trys to reinvent the wheel in every market instead of having a strong national product.
I'd even recommend that (despite a fear of collusion) that the bigger groups try to trade off stations and own formats nationally. I'd rather have two or three national formats in every rated market than 5 in one market, none in another and one or two in others.
Radio is much better off in nations where this is done than where it is not. We accept national programming on TV, but not on radio. I never understood that.