I think the question needs to be a bit more well formed for the answer written. Does he mean "why doesn't Wolfram opensource all its stuff", or "why not openso

I think the question needs to be a bit more well formed for the answer written. Does he mean "why doesn't Wolfram opensource all its stuff", or "why not opensource and also take contributions from a community", or "why is it that Wolfram is finding itself in a situation where there is no viable opensource competitor", or something else? I believe there are some Google opensource projects where the source is open (and even a libre license), but it's still presented as-is, with no real way for anyone outside Google to contribute. There are other projects where there's a clear corporate owner, but outside patches are accepted. It's not that I disagree with this post, but it's very unclear what this person means by "open source". So in the most scathing of all critiques, I would summarize this post as "not even wrong".