I tend to think this is an issue with 'designing' systems vs 'evolving' them. When you build something to 'scratch your own itch' and it suddenly becomes popular, lots of stuff you didn't think of tends to pop up. Maybe all the market studies, focus groups, ad nauseum in 'traditional' BigCo development actually did have some value.

Ansible at least had the advantage of being a 'broad' tool from the get go. So a lot of the common use cases were covered. But I'm sure surprises still popped up :-)