I would argue that Swift, a compiled, strongly typed language, is more a C++ replacement than it is comparable to Python or Ruby. The only "higher level" aspect would be largely hands-off memory management, but go is in the same boat there.
edit: Swift is no more an "apple thing" than go is a "google thing"
Rust might not really be a mozilla thing anymore. But is it entirely a coincidence that Firefox had become a lot crashier since they started shoehorning rust code into it?