Yeah, the js ecosystem does a lot of things right that are done poorly in other languages. Compare Yarn to pretty much any package manager besides Cargo, for instance. Another example is that Typescript integration into VSCode is top notch, better than any other language I've used
Yes -- deterministic builds was the primary selling point for many (including myself) when it was first released a few years ago. Npm has since improved somewhat in this regard, but yarn remains the clear leader.
