Deploying an update to 8.5 million devices without doing any form of staged roll-outs, not even just updating a few machines in the office first, is absolutely

Deploying an update to 8.5 million devices without doing any form of staged roll-outs, not even just updating a few machines in the office first, is absolutely bonkers. If that's not an unusual practice it bloody should be. I don't care if it's a software update or a config update.