I think of it as being like the "dash as /bin/sh" thing in Debian-derived distros. Software that's carefully done "by the book" or intended to be highly portabl

I think of it as being like the "dash as /bin/sh" thing in Debian-derived distros. Software that's carefully done "by the book" or intended to be highly portable is unlikely to have a problem. But a lot of things depend on bash/glibc without anyone particularly intending or realizing it, simply because their sheer market share means that such dependencies will "just work" for the vast majority of users.