Google has ZERO incentive for the python ecosystem to flourish. Remember the breaking 3.0 change came when Guido was an employee there, and go was starting to get mainstream traction.
I agree with the embrace-extinguish crowd. The strategy will be to introduce a huge breaking change in the next release.
This is a corporation. They don't do things for free. What started out as a "free" browser turned into a vehicle to capture a monopoly on internet video. What makes you think they dont have a long term plan to profit from python?