"Agile coaches who never wrote a single line of code." Hard disagree here. Of the agile coaches I've bumped into over the last decade or so the most excellent

"Agile coaches who never wrote a single line of code." Hard disagree here. Of the agile coaches I've bumped into over the last decade or so the most excellent one I worked with was entirely non-techy and made a dramatic difference to the quality of the team.