Comment 14 for bug 650498

Unicode's guidance on U+1E9E reads "capital sharp s is intended for
typographical representations of signage and uppercase titles, and
other environments where users require the sharp s to be preserved in
uppercase. Overall, such usage is rare. In contrast, standard German
orthography uses the string "SS" as uppercase mapping for small sharp
s. Thus, with the default Unicode casing operations, capital sharp s
will lowercase to small sharp s, but not the reverse: small sharp s
uppercases to "SS". In those instances where the reverse casing
operation is needed, a tailored operation would be required."

In other words, it exists solely to solve a very specific problem
where the irresistible force of all-caps setting meets the immovable
object of German orthography.

However, there is no rational reason or justification for U+1E9E to
adhere to the sloppy, ugly, and distorted capital version of "ß", any
more than a capital "A" should look like an enlarged "a". I would
suggest that as there is no consensus as to what this character should
look like, we seek a better solution - I would suggest a neat "SS"
ligature, which both makes the intention clear and doesn't
intentionally disrespect 500 years of German orthography and
typography.

Dave