I want to know why—in the 21st century—the Kindle app still doesn't support the interrobang or many other completely normal, not-that-obscure characters.
I sent feedback to Amazon about it: "Why TF don't you support the interrobang‽"
The other e-readers use normal, free fonts and thus, support nearly the entire unicode spec. Yet Amazon—with all it's enormous resources—can't seem to pull off supporting basics like the interrobang.
I can't wait for an usable open-source e-reader software for this reason amongst many others. I had to jailbreak my Kindle just to run Syncthing on it. Now I finally have an always up-to-date library. Why is it this annoying I don't get.