German sharp S uppercase mapping

[Julian Bradfield]

On 2024-12-02, Dominikus Dittes Scherkl via Unicode <unicode at corp.unicode.org> wrote:
> No. I want to be able if I have 2 files "Weiß.doc" and "Weiss.doc" on my
> system and copy them to windows, to get 2 files "WEIẞ.DOC" and "WEISS.DOC".

You can't have two files called "Weiss.doc" and "weiss.doc" and expect
to copy them both to Windows and get two files. Why is this case any worse?