I did consider to suggest that it was a bit weird to mention flexbox and not grid, but I figured most people who would have an interest in this would pick it up fairly quickly. I did also make another comment on this post that, at a sort of meta level, explained why I felt that the view of the author was wrong headed about modern CSS usage. That comment was pretty much just distilling some points I had been thinking to write as a longer article, but hopefully now I have it out of my system and I can get on to more important things!