It's really amazing. I'm a little worried that it's not going to last forever though, I'm not sure what the plan upstream is and how much is going to get merged, and it's literally just one person maintaining it as far as I can tell.
JFTR, FCStd-files produced by RealThunder's LinkStage[0] (fork of FreeCAD) is not fully backward compatible with an official FreeCAD app, and wise versa.
So, if you are planning to use LinkStage app for some large project, be ready to use only one app for the whole project and be ready to lost in whole or in part compatibility with the users of an official FreeCAD.
