Long-run, yes. Projects are too often multi-language these days, and if you mix C++ and Java, there might not be a clear or convenient seam between the C++ and Java parts.

Short-term, it will take a while after 1.0 for the surrounding tools and libraries to stabilize. It will take a little while for better documentation, blog posts, etc.

Personally, I find it a huge step up from e.g. CMake for C or C++ projects. But I’ve been using it for a while.