I think an important thing to note here is that this individual's team is very small. If you have a small team that closely collaborates then scaling things whi

I think an important thing to note here is that this individual's team is very small. If you have a small team that closely collaborates then scaling things which take discipline (like CSS) becomes vastly simpler. CSS is difficult because it takes so much effort to do things the "right" way. It requires a good set of linting and testing tools or constant vigilance to maintain a correct, robust system. As the codebase or team grows the difficulty of that task increases. That, to me, is why CSS often viewed in a negative light.