This is addressed in the first paragraph of the article.
> "I feel that sharing files between different computers is now a solved issue, and the benefits I get from having personalized my work environments are so great that I gladly pay the small price of synchronizing that configuration between my computers."
The issue is not solved when you sh into a container for a quick debugging session.
Or when you work in an airtight environment, like in banking.
It is 'solved' when the only computers you connect to is small enough to be be described as 'my computers', which seems like a pretty narrow use case to me.
> "I feel that sharing files between different computers is now a solved issue, and the benefits I get from having personalized my work environments are so great that I gladly pay the small price of synchronizing that configuration between my computers."