I'd never considered this explicitly, but it's an excellent point. It occurs to me that Google somewhat famously adds artificial downtime to their services to

I'd never considered this explicitly, but it's an excellent point. It occurs to me that Google somewhat famously adds artificial downtime to their services to make sure no one is relying on 24/7 uptime. I don't want to reduce people to server-equivalents, but I'll bet high vacation rates are a pretty good way of making sure no one relies too much on individual knowledge. Even from my personal experiences, lots of things get documented when the person who knows them well is heading out of town and there's a sudden scramble to formalize that knowledge.