It was a manpower and feature creep issue. The merge would take months, it would conflict with tons of existing and in development PRs, and would require a whole new set of unit tests.
FreeCAD until recently didn't have any full time developers, so executing a merge like that would have been very difficult as the longer you spend on it, the more out of sync it becomes with the main branch and the more work you have to do to bring it back in sync.
Again, those blog posts on Ondsel or the Issues page/forum for FreeCAD have more information if you feel like looking, but it's all a very interesting story and I'm glad that it seems to finally be resolved.
It was a manpower and feature creep issue. The merge would take months, it would conflict with tons of existing and in development PRs, and would require a whole new set of unit tests.
FreeCAD until recently didn't have any full time developers, so executing a merge like that would have been very difficult as the longer you spend on it, the more out of sync it becomes with the main branch and the more work you have to do to bring it back in sync.
Again, those blog posts on Ondsel or the Issues page/forum for FreeCAD have more information if you feel like looking, but it's all a very interesting story and I'm glad that it seems to finally be resolved.