Btw., critiquing: "This is how he cleans the code in 2024: Original version on the left; the cleaned-up version on the right:" -- that doesn't render side-by-si

Btw., critiquing: "This is how he cleans the code in 2024: Original version on the left; the cleaned-up version on the right:" -- that doesn't render side-by-side on my mobile and I wish every web author would consider labeling/naming content boxes instead; and would reference that, like good books are doing it.