If you reach into unstable language internals, yes there is a lot of churn. If you use public language interfaces, the language has been extremely stable for a long time.
The ecosystem quality and quantity depends a lot on what you're trying to do. If you're far away from numerics, then yeah, you will struggle a lot more. E.g. I wouldn't want to do web-dev in julia, but if your software product involves needing to solve an ODE, or a lot of linear algebra, I wouldn't want to be anywhere else.