Yeah, we use radios at work (and digitally trunked on some posts). What I meant though is that perhaps, as the Librem 5 will be a convergence device, it may be able to handle some sort of astrix/voip set up via mesh net and then that wouldn’t even be an issue. Anyhow, like I said before, I’m not a ham nor a computer scientist and so I would like to thank you and everyone else for contributing to this thread because it’s been, and I expect will be even more so, fun to see where it goes 
Also @Gracefulhippo, you were asking about secured radio communications (sorry so late, had to go to emerge earlier)…
This is a bare link to the industry leader for the digital trunking I mentioned earlier in this comment. I’ll let you decide whether or not if you want to follow it (obviously with out the leading …)
…https://www.harris.com/what-we-do/public-safety-and-professional-communications