I think this would be great in flyover country(plains states) but the coastal ranges and the Sierra would eat this thing alive.
A Cedar forest would turn these into fire hazards.
Can’t speak personally to the Sierras, but agree on the coast range, and imagine that would be true of any forested place with real topography. The steep hills would make for tons of roll overs, as well as make it very difficult to aim water accurately. Hard to do halfway up a hill.
Useless in any kind of steep country with reasonable-sized trees. Might be OK in sage and cheat grass range fires if the wind didn’t push them very fast.
True; and better to eat the machine alive than one with an operator. It appears a worthy start.