You really think that infrastructure IT is dumb unless it can brush off a Stuxnet-like attack by the CIA and Mosad? Most RR traffic signals in the US are run with mechanical logic, physical switches connected to circuits closed by steel wheels on steel tracks. Do you really want a “move fast and break things” tech bro to update all this stuff for us?

All kinds of infrastructure uses ancient software because it’s reliable. Updating it just to protect from hackers causing damage is likely to cause that damage unintentionally while doing little to protect from hackers anyhow.