Being able to totally override anything in Python (but rarely ever doing so) gives me that comfort.
Seeing a small section of my back deck totally renovated before doing the actual project gives me that comfort.
Having a million css options that I’ll rarely use gives me that comfort.
I dunno if others have this feeling? For me it’s not just rational or preparatory, it’s emotionally driven. I feel anxious about a project until I know I have all the tools and parts to complete it, even if inefficiently.