There are already at least two languages like this I can think of with good standard libraries, and good frontend support (Elm and Dart). But adoption of both i

There are already at least two languages like this I can think of with good standard libraries, and good frontend support (Elm and Dart). But adoption of both is low. I don't think it's a coincidence, nor do I think it's just a product of circumstances. People are still going to use JavaScript, no matter how many better things are out there.