Eh, while there is a certain potential, the primary failure mode for pneumatics is just a simple rupture, where a pipe splits and all the air runs out. Even th

Eh, while there is a certain potential, the primary failure mode for pneumatics is just a simple rupture, where a pipe splits and all the air runs out. Even that is easy enough to avoid by adding a few relief valves here and there that spring at the working pressure of the system, but that's not really a failure, and other house systems have comparable safety features, so not really a distinguishing feature of pneumatics vs electrics.