I don’t get how a software can be in alpha or beta version and by the developers be called ready for production environments. It doesn’t make sense by itself. In some way it’s not an honest way of communication, telling us two contrary things at the same time.
Alpha versions are actually quite severe. It means that features can be removed or added breaking the whole system. It means not providing an upgrade path for database changes. It means new bugs will be introduced by new features. Beta normally means a feature freeze but still not considered stable enough for production, due to bugs and security issues. RC, a “release candidate” is almost ready but you give it a bit more of testing time to make sure no critical bugs are left. And after that you get the version that is safe for productive use.
They are far away from a productive version, but telling us to use their development version as such.