> Maybe calling free software "Open Source" was a mistake.

This conflation is definitely a bad thing. Words with an actual meaning get over-used, simplified, stripped of their original meaning, and then merged. It would be 100% to the detriment of our language if it happens in this case.

Open source does not mean free (as in freedom or beer), free (as in beer) does not mean open source. Free as in freedom almost always means open source.

Side rant: Also, open source doesn't mean "open to contributions". Giving access to the source code does not mean obligation to accept contributions to said source.