Jokes aside, JS ecosystem really needs a competitor. Web developers have been cutting corner after corner for decades, with ever increasing disregard for performance and memory consumption.
Now with both Python and Rust in the browser, things may change for the better.
It is interesting from an interoperability point of view, but this purely negative from a performance and maintainability point of view.
But in picking up modern frontend, even in the past two years, the frameworks and toolchains have matured or simplified a great deal.
The training options are plentiful. To some extent, Node has Deno “competing” to add features and provide performant backend.
Esbuild, for example, is built on rust and unlocked massive performance improvements in bundling.
It seems like JS is in a better position than it has ever been.
All others have lots. That's the point.