There are about 12 or so command trucks around, bought a few years ago with grant money and deployed by BSSA I believe. We have one locally, but it seldom sees the light of day. They built a barn to put it in, and I got to see, the guy told me the batteries are always dead and it has dust on it.
This all goes back to training and participation. Those radios are going to need constant attention, programming updates and swaps if they are to be ready and effective for use in any 5-10 county radius at any time. The MARCS radios likely need many updates. Now I can't say for sure that it has NOT be done at all, but contacts tell me only one guy got training on how to use it, so if they need it, he has to set it up. There are plenty of instances to use it, if only they take it to county fairs and show it off, use if for a local "base" and setup some radios for a repeater for security there. Do they? No. No exercise to be ready. The Sheriff recently said that someone should have called when they had trouble at a local fire scene with communications....by the time they got it there it would have been hours too late. And, it would not have helped with their issue, which was essentially a programming consistency and poor battery issue on portables. But it all goes back to lack of knowledge...you can own a mechanics tool set, but its worth nothing if you can't use them.