[ianbutler]

Sure, I agree. Let's start popularizing other terms, but I think the relevance of the term Open Source will see a substantial decrease then, because I don't think people now largely use the word to mean what it meant decades ago. I think the popularity the term has now is for reasons entirely different, reasons like community building and some reasons of morality, and I think the term can either evolve to fit the industry's current norms or be reduced.

I would assert/guess/think that there are more developers who have started in the last 10-15 years who use the term for its colloquial meaning than there were developers in the entirety of the field in the preceding 50 years. Just from a numbers perspective, if I'm right, the colloquialism is going to win out.