Sorry, it was a busy day. I was agreeing with everyone else here. The move fast and break things attitude is one we can't afford when building control systems for critical infrastructure. I used to work in big tech, and if I pushed an update that didn't work or wasn't tested properly, the worst thing that could happen was we revert the change and there's a minor inconvenience to a user. If Facebook goes down for an hour, the company loses money, some advertisers get mad, and their users get frustrated. If an industrial Siemens SCADA operation goes down for an hour, the best case is the operation (be it a factory, airport, wastewater plant, etc.) shuts down for an hour. The worst case is people get sick or die.

It sounds dramatic but every update or change to the system rocks the boat and exposes it to a whole new tranche of dangers. So we spend most of our time observing. There's no such thing as a casual QoL update in SCADA.