Though it useful to point out that the Unicode superscripts and subscripts were also originally intended to be ascenders/descenders (which in the strictest sens

Though it useful to point out that the Unicode superscripts and subscripts were also originally intended to be ascenders/descenders (which in the strictest sense would also affect line height) are as represented in most fonts instead as roughly "numerator/denominator" numbers instead of "proper" superscripts and subscripts. The W3C recommends to prefer the markup versions, and various years the Unicode committee has also suggested not to use the Unicode versions except in backwards compatibility with old ISO codes and in certain semantically more meaningful situations as "single words" (chemistry formulas more so than math, for instance). Though the Unicode recommendations have waffled back and forth over the years. Both have recommended it in part because of metadata available to screen-readers for accessibility. Not that you always have to follow such recommendations from groups such as these, just that it is useful to know what the recommendations are. Also as others pointed out, some CSS stylesheets are better than others at line-height of sub/sup markup and while the default styles are kind of awful, it is useful to know there are CSS options. https://en.wikipedia.org/wiki/Unicode_subscripts_and_superscripts https://en.wikipedia.org/wiki/Unicode_subscripts_and_supersc...