I have followed this thread with some interest, having grown up in Germany. I do still visit fairly frequently.
It's totally possible to change uppercasing functions if & when warranted. But is it, yet? As a library implementer and German speaker, I have been looking out for the supposed sea change in usage, and haven't seen it. For example, looking at product packaging, where all caps are more commonly used than in regular text, I see SS and lowercase ß, but little if any ẞ. Try searching on amazon.de for "fußcreme" or "füße". I have some photos from Germany with similar results, with only one cereal box using the capital in “EXTRA GROẞE CRUNCHIES“. fußball.de <http://xn--fuball-cta.de/> still (despite browsers abandoning transitional processing) redirects to fussball.de, and that page advertises itself as FUSSBALL.DE <http://fussball.de/> right up top in the site menu. There is an article about KINDERFUSSBALL <https://www.fussball.de/newsdetail/neuer-kinderfussball-was-fans-wissen-muessen/-/article-id/263976#!/> and GRÖSSERE CHANCEN. The https://www.giessener-zeitung.de/ has a prominent all caps title with ẞ. I think they have been an early adopter. However, their front page weather forecast is titled GIESSEN, so this could be chalked up as title calligraphy. The https://www.giessener-allgemeine.de/ does not seem to use any all caps. The https://www.giessener-anzeiger.de/ has a topic for LANDGERICHT GIESSEN. The city website gießen.de <http://xn--gieen-nqa.de/> also still redirects to giessen.de and does not use any all caps. So it looks very much like in German all caps SS reigns, ß is fairly common, and ẞ is very niche. markus
