[folkrav]

I see the opposite often argued too - that open-source is too wide a term as could also be understood as source available, and that FOSS/FLOSS should be preffered. But you're right, looking at most literature, most people seem to refer to oss and foss to be largely the same thing. I guess my biases are showing lol

Coming back to the original argument - which was that React was not truly open-source - being MIT, it 100% is, so I still don't understand it. That they prioritize their own needs for feature development is pretty much irrelevant, the source is there and you have permission to fork, tweak and publish changes on your own at any time. You legally are in your own right, but they don't have to make it easy on you.