I think you underestimate the work it takes to maintain and more importantly grow such a large open source project. If wp engine can barely contribute today, what are the chances they want to take on the whole thing. Nope they just want to get rich off open source. That's understandable , they are a for profit after all. But at what point does it make sense to give back in terms of either money or time to make improvements to the ecosystem that you depend on.

I agree with Matt's ideals but not the actions. The reality is theres not a whole lot he can do without looking like spoilt kid taking his ball away from the game.