That's what got me with it - the author states as if it's fact that best practice for CSS-in-JS is copy and paste, but I've never seen anyone advocate for that.

That's what got me with it - the author states as if it's fact that best practice for CSS-in-JS is copy and paste, but I've never seen anyone advocate for that. Especially with Webpack etc, it's trivial to just import JS styles and re-use. Sealed the fact to me that the author is biased towards CSS, without actually knowing anything about CSS-in-JS solutions.