I will start this thread a bit early, as on the Conda packaging side @looo already did most of the work and i have some items left on the todo list, like documentation support and taking a look at:
https://github.com/FreeCAD/FreeCAD-AppImage/issues
It would be good if people can start reporting things like on what Linux distribution FreeCAD 0.19 AppImage currently doesn't work (or it does work).
Note that the current plan is to include the Assembly 3 module in the FreeCAD 0.19 stable AppImage. Best to start testing, Assembly 3 module is already included in the FreeCAD 0.19 daily AppImage.