There are definitely stable systems where the operational budget is so small that the cost of a human trained on it is higher than the ops budget. This can resu

There are definitely stable systems where the operational budget is so small that the cost of a human trained on it is higher than the ops budget. This can result in one of two terrible consequences: Either nobody touches it and it gets stale, or it's viewed as being "Underdeveloped" and poorly-considered features are added. Trying to "optimize" these systems to use more of their error budget and save operational cost results in fiascos - There was a multi-day outage (not full outage, but several full days below SLA) on a minor system while I was at Google where it boiled down to "Bad Engineer tries to justify their job and management lets them implement a poor design over the objections of everyone".