I mean, you could also argue that the lack of reliance on physical controls caused the incident in part. For example, a City's public works department may have remote access/control for some of their equipment, but they also have a kill switch that removes all connectivity and reverts the system to a default setting. They also have checks in place like "if the unit heater will be overamped, turn it off." This seems like it was caused by a lack of security considerations when making these devices "online". Old tech can work very well for a long time as long as it is modernized correctly.