Is there some reason it's unsuitable for that? Or is it just that it takes a long time to build that tooling with any new language?
So imagine how you would design a language with dependent types that would match the productivity of Interface Builder when designer GUIs.
Or a being able to provide something like Unity.
Not only the whole interactive design process, but also the ability to ship UI components that can be integrated into the designer's toolbox.
How would a drag & drop action, or mouse click binding an event to a slot, reflect into the existing type definitions.
Plus that was just one example, I can pick Delphi, Smalltalk, Windows Forms/WPF/UWP, VB or plenty others as example.