I would have preferred Rust, a language created by Mozilla instead of one with ties to Apple, but I'm not dev so I can't really judge. What are your thoughts?

I don't know anything about Swift, but people like to ignore the fact, that Rust is not entirely free, as it fails to exercise freedom 3.
tl;dr: Rust Foundation don't want you to apply modifications to their language without "explicit approval".
And you are also limited to share modified versions of their software.

(If someone can imply, that Python and Perl have similiar restriction — they are not the same, because both of their trademarks protect usage of software against fraud, but you can freely patch and modify it.)

For me personally, seeing LadyBird not choosing Rust as their main language is very promising. Rust software is everywhere now and this is concerning.