I'm a product designer and not a programmer but for what it's worth, I think you're really on to something here. Zolang strikes me as a very powerful coupling with Rust, in particular in GUI development. I'm not judging your programming based on its syntax or standard library but rather by its problem statement.

The most notoriously difficult problem in GUI development is cross-platform. It's a holy grail within software development. Every major company is taking an increasingly larger stake in this race and a few like Qt are selling it directly as their core product.

Zolang sounds like it could be a bit like Elm or Flutter, but one layer above, able to orchestrate a little bit of platform-specific glue code where it's always gonna be necessary.

The programming language landscape is extremely tough. It's very hard to beat any language on language features alone. You also gotta compete with its community, its libraries, the enterprise support and so forth. You gotta carve out a really special niche for yourself, your very own domain. And I think Zolang's domain should be GUI development.