With the recent Masso announcement, and my work with FreeCAD, I am looking at LinuxCNC as an alternative to the Masso. (LinuxCNC seems to be FreeCAD’s baseline controller)
Being Open Source LinuxCNC (GPL2) are obviously free to use even commercially. And they seem to have a release cycle of every 6 months. Their GitHub appears active.
LinuxCNC has supported “cutter compensation” for years.
Paying once to switch, may be a good thing.