So maybe that dual power needs to involve some dual infrastructure, yeah?
Start a mutual aid group who fronts as a tech support collective and gradually install mesh routers and nextcloud instances throughout your neighborhood to make it redundant in case of internet “outages”
All true, but on the other hand, ultra wide band tech might be able to evade jamming, if not detection. I’ve heard some promising things about using the opacity of the atmosphere to create a distributed optical network. When you’re just trying to coordinate forces and not, say, stream 4k bullshit, there’s a lot more possibilities.