I'm genuinely interested in learning more about the shortcomings of meshtastic if you have a link to share. Groups like the Anarchist Black Cross seem really supportive of the tech for disaster situations. Even Benn Jordan claimed it played an important role during the floods in NC
My understanding is that it relates to the flood routing in meshtastic. I haven't heard a real-world failure example, but another comment on this post mentioned defcon being a case (I don't know anything about that).