I'm a big believer in keeping things simple. I see meshtastic as adding another point of failure, as those nodes need to be powered, so you're creating a UHF, low power digital network. In a rural setting, you're going to need many sites; that adds costs, maintenance, and engineering. Essentially, it's recreating a cell phone network, and your communications ability becomes dependent upon the network. So in a dystopian scenario, the monolithic enemy takes out a couple of critical nodes, and simply waits for a repair team to arrive. Just like a lion waits next to a watering hole. Sure, the loss of a couple of nodes in an urban area isn't overwhelming, but in a rural situation, there wouldn't be that many alternatives available.
An alternative would be using D-star or Yaesu Fusion radios and sending text with them, using simplex.
My MAG has tried ATAC, and it wasn't effective in a rural setting. Plus, the ATAC data wasn't encrypted, so anyone could tap into the location data.
I see meshtastic as an overcomplicated means of communication that is being pushed as the next big thing by a bunch of tech fanboys.