They're synergistic roles, yes, and ideally you would like one with a mix of both [either a dev with sufficient experience in system administration or a system administrator with sufficient experience in development] to tackle the messes that crop up, but I haven't seen anyone claiming they're interchangeable - just that most of the population of HN is some overlap of the two.
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They're synergistic roles, yes, and ideally you would like one with a mix of both [either a dev with sufficient experience in system administration or a system administrator with sufficient experience in development] to tackle the messes that crop up, but I haven't seen anyone claiming they're interchangeable - just that most of the population of HN is some overlap of the two.