"Ya know, there is life outside of the NYC area, and the need for common channel naming existed long before 9/11"
BUT...if the City of New York, with its thousands of emergency employees, dozens of agencies and sub-agencies of their own, plus state, bi-state, and Federal agencies, plus other major agencies from surrounding counties, working daily in the same geographical area, a place where some of the biggest incidents happen, sometimes more than once a day, doesn't use these so-called "interoperatability" channels, just how important are they to a place with a name of, say, East Cupcake, need them?
Sometimes, if you pay attention, you hear people saying...rightfully...that the Federal government (or its own sub-non-government agencies, like APCO) should keep themselves out of state and local issues, primarily because bureaucrats in Washington DC have absolutely no idea what's necessary in places hundreds...if not thousands....of miles away from Washington, as in the above imaginary "East Cupcake." Yet they continue to dictate...yes, DICTATE...what and how local agencies shall operate, inflicting major financial expenses on these local taxpayers, sometimes on those who can least afford it, to institute a policy that, as discussed here, no one will ultimately or effectively use.
This is a primary example of that.