Mesh WiFi is getting more common all the time, using proprietary protocols that require all participants to use the same brand of equipment, unfortunately. (Not really a problem inside the house though, I love my Netgear ORBI mesh WLAN)
The WiFi Alliance’s EasyMesh standard promises to standardize this, but only one manufacturer has implemented it so far, as far as I can tell.
But if such a standard was to catch hold, it should make long-distance rural mesh WiFi as easy as clicking “buy” and plugging in.
EDIT: I’m so enthusiastic about the potential for mesh networking, that I’ve gone on silly rants before about allocating all of our spectrum to spread-spectrum technologies. If we had a networking architecture in which more nodes == better connectivity (rather than tighter bottlenecks) then there’d be no reason to have private carriers at all any more.
It would eventually scale to a much larger and much faster network than the current paradigm, and AT&T would cease to exist.
OK, back down on earth, I’m sure there are significant technical challenges I haven’t considered yet. Still…