I think that it is poised for rapid growth this year. I've been using it quite a bit, and once it gains a more comprehensive standard library, I think it will be much more useful in practice. Given the activity on GitHub, I would suggest checking back in a few months for a more out-of-the-box experience (it will still be a new language - but more ready to entertain serious projects). However, I would give it a try now if it looks interesting to you, install the VScode extension, look through some samples and leave some feedback on github.

As a side note, it has pretty great C interop, so you should be able to use C libraries or your own C code, for missing functionality. Documentation on this feature is unfortunately lacking right now though.