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I tested meshtastic in a major european city with pretty much 100% mesh coverage and its real life performance was quite underwhelming. Often I would receive messages that I could not reply to because of differences in antenna gain and crappy mesh performance. Public chat was either completely dead or flooded with test messages. Everything was super slow because the mesh can’t actually scale that well and craps out with more than a 100 nodes. Even medium fast channel would clog up fast. I would never depend on meshtastic during an emergency because it barely works even when nobody is using it. I think a public wifi mesh would be more worthwhile. Older used wifi routers are pretty much free and in unlimited supply. They use very little power. Everyone already has a compatible client device on their pocket. Sure the mesh would fail during a total blackout but at least it would be useful for something when the power is up.

Meshtastic, like any other network (including mesh wifi) is not immune to the requirement for some planning.

My area has a couple of very well-placed mountaintop ROUTERs that tend to suppress most of the low level urban flooding noise, and so local messaging out to 80km or so tends to be pretty reliable. The same would be absolutely impossible with wifi.

That’s with 80 or so local nodes on LONG_FAST, population of around half a million.

Thats said, Meshtastic’s routing algorithm is extremely inefficient and has huge room for improvement.