I think there is a lack of companies willing to hire for it, and also a lack of qualified people to hire.

I would like to learn it and probably would like to work with it. Only downsides I see is reliance on JVM (which is also a strength) and not as good ways of recursion as other Lisps or Schemes (simply call the function, duh, because it just works and doesn't need extra keywords or syntax).

But I liked the talks and that is seems to have the functional datastructured one needs, if one wants to avoid mutation.