Malicious actions are a concern, but they’re at about the same level of concern as alternative acts of terrorism. Unintentional errors in the things you list do

Malicious actions are a concern, but they’re at about the same level of concern as alternative acts of terrorism. Unintentional errors in the things you list don’t feel like they’re huge threats. I would Imagine incidents with at most tens of cars and a relatively low risk at that. Not good, but not a scalable threat.