[hmwhy]

Maybe I am wrong, but I would assume that the most sensible place to start with is the MDN Web Docs[0] in this case instead of looking for blog posts.

Throwing out blanket statements is dangerous for new comers, which seems to be the target audience of this article according to its title. For example, collapsing margin isn't always bad and unpredictable, it just seems that way if you didn't take the time to understand the fundamentals behind and go for "what works".

That's not too different to telling CS students to not worry about learning the memory and time complexities of different algorithms and just use [insert "best" algorithm] because it works most of the time.

[0] https://developer.mozilla.org/en-US/docs/Learn/CSS.