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).
That would've been too easy - instead it's now used in fewer places, but with new rules ;) When it's long-pronounced, ß is still used, like in Fuß or Stoß. In words like Fluss it's replaced with ss.
Not entirely. The spelling reform (about 10 years ago) somewhat reduced the use of ß but you still use it frequently after a diphthong (as in "Straße" [street]).
I tend to still write in the old spelling (I didn't have to take exams in the reformed spelling yet so I never bothered to memorise all the braindeadness) and rely on Word/Outlook to correct me where necessary. That works quite well so far.
It might depend on where you live. I took a recent trip through Germany, Austria, and Switzerland and I noticed that Austrian street signs tended to use "Straße" while German and Swiss tended to use "Strasse".
OTOH it could also be just spending priorities of updating street signs vs. other things.
I knew nothing about the phasing-out of ß until reading the comments on this article.
In Switzerland, "ss" is standard (Duden says: "In der Schweiz kann das ß generell durch ss ersetzt werden <§ 25 E2>.") I haven't seen "Strasse" on signs in Germany, but there might be regional variation (since street signs are a local-government responsibility)