> it has a very non-open development model - development happens behind closed doors, no process to accept outside contributions, chuck a source code dump over the fence some time after each binary release.

Mostly agree re: your entire post, but, re: OSS above, does not matter, you don't owe an open development model to anyone.

I think there can be a difference between the literal and official meaning of a term, and what it most commonly means in practice - and that’s a descriptive claim about how words get used, not a prescriptive claim that anyone has some moral or legal obligation to do anything in particular