Behold, Rust is blazingly fast in approaching the most popular language :)
Also, in comparison to Python you can do pretty much everything throughout the stack, which would be the reason I would go for Rust (not mentioning all the other niceties it has to offer).
Also learning Rust nowadays is much more approachable compared to say 7+ years back (ecosystem got way better)
Nah, it's not, code is modular (IME should be kinda tree-structured), a book is linear.
So the API should be in your analogy the synopsis. And I haven't said, that there shouldn't be any comments. E.g. doc-comments above functions, explaining the use-cases and showing examples are good practice.