Right, crucially cargo is in the box with your Rust compiler, you have to go out of your way to have just the actual Rust compiler but not cargo.

As with the lesson gofmt taught, you must supply the basic feature in the box. Humans are lazy, so if it doesn't come in the box only people who know they can't live without it will even bother, put it in the box and only people who can't live with it will remove it.

That's why we need a new build system / package manager for C. /s (but not really)

https://xkcd.com/927 comes to mind.

Yeah, that's the joke. But I mean, you have to admit the status quo isn't that good. Something really very much better might be able to claw its way to the top.

Please perish the thought.

But C ships to all sorts of places, so why would C limit its options by limiting its support to its own package manager?

How would having a builtin build system (I'm not even asking for a package manager) limit where C can ship to?