javascript is great for the frontend. not just because it’s the only choice, but it’s also a lot easier to write code for ui than say, C or rust.
however i do not see a reason why it needs to run on servers or desktop apps, bar a few cases. i know node is popular, but i think fullstack devs just like to have everything in the same language, even if it makes it harder to use and slower to run.
likewise C, rust, go, whatever, are great for backends, embedded etc, but they shouldnt be ran on in the browser, unless there is a specific reason like heavy computation with little dom interaction.
just because a barrier does not exist doesnt mean that we should write programs in a language not designed for the domain.