Unicode started with a small and apparently closed set of superscript Latin letters. This set has now grown to include all or almost all of the basic Latin alphabet, as well as a good number of capital letters, Greek letters and non-basic Latin letters, many of them in the Phonetic Extensions block. The way in which these have been added piecemeal means that they are non-contiguous and confusing.
There's no fixing that now. Deal with it.
My point in intervening on this topic is to suggest that more forethought is given to subscript letters, by allocating a contiguous block into which they can all be fitted so that they can all be used without having to be justified individually.
But we don't do that.
Alternatively, let's leave all subscripting to markup.
Not this kind of subscripting, and we already have subscript characters. -- Michael Everson * * Everson Typography * * http://www.evertype.com
