I'm pretty sure they refer to the inability to type ß. Which is a real concern for type writers, less so for most keyboards. I'm writing this using an American

I'm pretty sure they refer to the inability to type ß. Which is a real concern for type writers, less so for most keyboards. I'm writing this using an American keyboard and I don't see why I shouldn't use "ß" just because it's a different key(-combination). I also wouldn't start writing "spaet" just because "ä" takes a bit more work (Alt+U, A).