Here is another excellent breakdown by Joshua Comeau, who is my go-to for all things CSS-related. He goes over the practical cases where you do want to mix and

Here is another excellent breakdown by Joshua Comeau, who is my go-to for all things CSS-related. He goes over the practical cases where you do want to mix and match units, how browser zooming affects accessibility, etc. https://www.joshwcomeau.com/css/surprising-truth-about-pixels-and-accessibility/ https://www.joshwcomeau.com/css/surprising-truth-about-pixel...