You’re missing the point. I’m not making a direct comparison, obviously CSS Grid and Flexbox are different. I was demonstrating how the same layouts could be created with flexbox using the EXISTING Bootstrap 4 classes, that don’t require additional CSS definitions and media queries as shown in Per’s article.
Now that Bootstrap 4 uses flexbox, unlike Bootstrap 3 floats, I was making the point that some of Per’s claims about Bootstrap we’re inaccurate such as the 12 column limitation, and the unflexibility of flexbox as compared to CSS Grid.
As I stated… “ I don’t think CSS Grid will ever be a replacement for Flexbox…. CSS Grid may work better in some cases for the overall layout, but Flexbox excels at micro-layouts.”