Several people in HN should know more about OO than Armstrong.
There are academics that have taught and worked for decades on OO systems and concepts among the crowd, unlike Joe.
In general, popular language creators are hardly the more knowledgable of the various PL concepts and issues. Simon Peyton Jones probably knows hundred times more about such stuff than Matz or Guido do, for example.
It's worth pointing out that the original comment claimed Armstrong had no OO experience... not simply that Armstrong wasn't the most knowledgable OO programmer on HN.
Several people in HN should know more about OO than Armstrong.
There are academics that have taught and worked for decades on OO systems and concepts among the crowd, unlike Joe.
In general, popular language creators are hardly the more knowledgable of the various PL concepts and issues. Simon Peyton Jones probably knows hundred times more about such stuff than Matz or Guido do, for example.