I recall in the early 00's people would proudly display that their HTML/CSS was 100% valid. Maybe a badge/score to say how well a site is for efficiency, at le

I recall in the early 00's people would proudly display that their HTML/CSS was 100% valid. Maybe a badge/score to say how well a site is for efficiency, at least for the front end. Unused code etc being deductible from say a score of 100.