Yes. All rules and idioms are rules of thumb, useful for making quick decisions. All of the rules have exceptions. You are becoming a senior developer. If you

Yes. All rules and idioms are rules of thumb, useful for making quick decisions. All of the rules have exceptions. You are becoming a senior developer. If you're talking to someone who thinks you should always write tests, always DRY, everything should be OOP/Functional, then you're talking to a junior Dev.