When still in construction engineering long ago, I was a whiz with AutoCAD. The move to BIM via Revit, another Autodesk product, was widely predicted.

It was impossible to fathom any widespread exodus from these standards, given the massive corporate backing on an already complex software ecosystem with a deep legacy. It seemed, at the time, unlikely that any competitors, and certainly not open source or free solutions, would ever gain competitive standing in industry versus the entrenched Autodesk solutions.

Has this changed?