I know some projects like Koreader[1] use Lua as their primary application language. If you could convince one of them to switch, it would provide some assurances about the maturity and popularity of the idea.
That's a neat suggestion, thanks.
Lux will need some time to become mature, but building a large multi-platform project like koreader would definitely be a nice goal.
[1]: https://github.com/koreader/koreader