> JavaScript itself, it had some issues in the past, all the big issues were resolved

What about automatic semicolon insertion (ASI)? This makes it impossible to internalize how the JS implementation will interpret your code without memorizing a bunch of special cases, and makes "newline" semantically significant even if you only intend it for formatting your code.

It's never going to be fixed because of backwards compatibility. I can put up with a lot of language peculiarities, but I don't like wondering if some random "return" statement in my code is going to misbehave because of extra whitespace.

This is enough reason for me to keep looking for an ideal language.