I'm helping introduce some DevOps concepts to an ops team that has been doing things in the "traditional" way for a very long time. They've been building script

I'm helping introduce some DevOps concepts to an ops team that has been doing things in the "traditional" way for a very long time. They've been building scripts in the past couple years to replace what had always been manual work, but it's been interesting to see their perspective. Nothing is idempotent on purpose: they know whether a database exists, whether schema changes are pending, whether a hostname needs to be updated in DNS, so their mindset is simply to not run those scripts if not needed. I thought the big task would be introducing source control and CI/CD, but I quickly realized idempotentcy is actually the more fundamental and key concept that I need them to embrace.