[Bender]

This is technically correct but there is no harm in them setting up a mesh in the event that the internet goes down assuming they have their own backup power. The USA and EU are both extremely vulnerable to power grid overload, cyber-attack, physical attack choke-points leading to black-starts, EMP, GRB and much more. I think it's good on them for the learning exercise and hopefully they add to existing documentation.

[cortesoft]

If the power grid overloads, I am not sure that your mesh network will survive either?

[WD-42]

It runs off solar.