Trust is a very strong but brittle thing. Once broken it tends to shatter like glass. I'm sure this situation would feel like a sword of Damocles to anyone who has significant investment in the unity platform, and who would want to voluntarily walk into such a position now?
In addition to advancing freedom, it's also genuinely advancing the technology of the human race. Both philosophically (as any other tech is simply what they PERMIT you to do), and practically... as even the worst technofacist vendor-lockin saas'ers build their empire on the backs of open source stacks.
Gotta sue the alphabet, at that point.