During the spelling reform debates in Germany there was raging controversy about this unique 'mono-cased' character. Now they've managed to pass their dubious law which states:

"For the sharp (voiceless) [s] after a long vowel or diphthong one writes ß, as long as no other consonant follows in the word stem.". Which means that the famous 'daß' now becomes 'dass', but 'groß' stays that way.
I think it would be really sad to see it go, but Switzerland has paved the way and it is probably just a matter of time now.

§ - In German this is called a 'Paragraph' Zeichen (section;article). Just reminds me of law and politics :-(

cµ