So while this is probably a good answer to the hypothetical question, that’s actually not a good thing, you realize that, right?
Special tools exist because different problems require different solutions. And sure, then can be a huge overlap of those tools, but you can’t literally do everything with a single tool; chances are it’d be a shitty tool. Either you can’t actually do everything with it, or it’s so complex that you don’t want to use it in the first place.
Javascript is somewhere in between, in the sense that it’s both kinda terrible for most of the jobs you mentioned, while also not actually usable for “everything” - i.e. it’d be a terrible language for anything that needs to be performant or reliable. Hell, we have JS in crap like Gnome now and it’s a nightmare.
So while this is probably a good answer to the hypothetical question, that’s actually not a good thing, you realize that, right?
Special tools exist because different problems require different solutions. And sure, then can be a huge overlap of those tools, but you can’t literally do everything with a single tool; chances are it’d be a shitty tool. Either you can’t actually do everything with it, or it’s so complex that you don’t want to use it in the first place.
Javascript is somewhere in between, in the sense that it’s both kinda terrible for most of the jobs you mentioned, while also not actually usable for “everything” - i.e. it’d be a terrible language for anything that needs to be performant or reliable. Hell, we have JS in crap like Gnome now and it’s a nightmare.