I’m using it right now, at least for personal project development. It’s surprisingly reliable. Aside from the well-known USE flags that let you nitpick stuff at compile time letting me mix newer stuff while keeping the rest stable.

I do have my complaints:

• it’s rolling release, making it less fitting for production use, tho not as bleeding edge as Arch
• the package management logic could perhaps be more robust; one of my pet peeves is that it keeps pulling the latest version of Python despite not being used
• some slight, relatively meaningless changes in package metadata might trigger recompilation
• the default configurations might not be the most sane

I have found sweet spot and preserved my configuration here for anyone to use.

Why is it in Java??