Most enterprise customers I've dealt with don't even care about things breaking that much, they care about control. That's the much bigger thing. Things break.

Most enterprise customers I've dealt with don't even care about things breaking that much, they care about control. That's the much bigger thing. Things break. Let's just make sure we don't break things while our customer is dumping silly amounts of money into an EU-wide advertisement campaign. Or we tend to freeze updates during christmas, due to the christmas business of our customers. With those guys, it's fine to execute risky changes on productive systems, as long as those changes are tested, communicated, scheduled to a non-critical time of the customers and include backoff-plans. But yes, this naturally slows things down, or makes systems more complex and expensive due to redundancy and staged rollouts.