‘What everybody gets wrong’ is just clickbait. Not everybody gets this ‘wrong’. Many have been arguing that a spectrum of solutions are possible/advisable for cooperative work technologies.
The 2x2 matrix of same place v different place X same time v different time is not some novel concept. It goes back to the earliest days of ‘Groupware’, a term that has fallen into disuse. In fact I am certain that I used that model in my closing keynote at the 1995 Groupware and Workflow conference on ‘The Future of Groupware and Workflow’. It is one of the most foundational ways to consider the utility of solutions.
This treatment — by Drew Dillon — singles out internal v external as an instance of or replacement of the same place v different place dimension. But again, that’s only one instance of a long list of ‘same v different’ places that can be discussed.
Dillon makes a solid contribution here, and proves — perhaps inadvertantly — that 20+ years later, we are still discussing the foundational elements of cooperative work technologies.