One thing to keep in mind is that it's not even a very good mesh network.
There's a Zero Retries article recently with a critical review of meshtastic. Or find my comments on meshtastic here.
If anything they showed there's demand for a public mesh. Unfortunately, they didn't want to learn from AlohaNet or any of the other meshes.
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You’re understating it. Meshtastic is horribly designed. If you designed a wireless mesh network making all the worst possible choices, with the most shortsighted design decisions imaginable, you’d get something a little better than Meshtastic.