What do you suppose the proportion is of computers actively running Windows in the world right now, versus those running some kind of *nix/BSD-based OS? This includes everything a person or machine could reasonably interface with, and that's Turing complete (in other words, a traffic light is limited to its own fixed logic, so it doesn't count; but most contemporary wifi routers contain general-purpose memory and processors, many even run some kind of *nix kernel, so they very much do count).
That's my case for Bash being more or less everywhere, but I think this debate is entirely semantic. Literally just talking about different things.
I think if someone were, for example, to release an open source C++ library and it only compiles for Linux or only comes with Bash scripts then I would not consider that library to be crossplatform nor would I consider it to run everywhere.
I don’t think it’s “just semantics”. I think it’s a meaningful distinction.
Game dev is a perhaps a small niche of computer programming. I mean these days the majority of programming is webdev JavaScript, blech. But game dev is also overwhelmingly Windows based. So I dispute any claim that Unix is “everywhere”. And I’m regularly annoyed by people who falsely pretend it is.
That's my case for Bash being more or less everywhere, but I think this debate is entirely semantic. Literally just talking about different things.
EDIT: escaped *