Indeed, all these mesh network fanatic seem to forget that outside the densely populated cities where they live there are vast sparsely populated areas. How does your mesh network reach those areas without being prohibitively expensive?
Even within densely populated areas, the technology doesn't scale well. This only works well at a very specific device density. Field testing has shown that much above or below this density, the performance of the system becomes badly sub-optimal.
It should also be noted that at no density is the technology performance competitive with hardwired providers. This is because as the density goes up, you need more and more primary gateway routers to keep the link latency and link saturation down. This turns out to be right around 2.2 hops per primary access (hard-wired) nodes. In practice, this requires so many hard links that you don't save much compared to just providing hard links to every home, and everywhere that mesh technology is economically viable, hard wired access is also economically viable and vastly superior in performance.
Lastly, the technology is highly susceptible to spectrum poisoning. The only good solution to that is to have a dedicated piece of spectrum for just mesh technology, but that spectrum would be worth close to $100B, and that alone renders the technology completely uneconomical. Current mesh solutions use the 2.4GHz and 5GHz bands, but both of those are also used by just about every home wifi that is included with any type of Internet access. This punches holes in the mesh that cannot be effectively compensated for. This is only going to get worse as the IOT becomes more and more prevalent.
There are a few mesh networking startup providers that I am aware of, and all of them are plagued by poor performance, poor profitability and poor service reliability. I fully expect the introduction of 5G wireless spectrum from the established cellular carriers to put the final nail in the mesh coffin.