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Will is correct. It has just been released and it's also quite a big change.
However, I must say that I'm surprised how good the F000 is playing around with it. It's far better than any WF release and it feels as stable as WF5 M100 so it does look promising for the coming M-releases. M020 is scheduled for release Nov 18.
That said, only you can make the decision when to move and you must set up a test environment based on your hardware, config settings and , if you use, PDM. It's risky to base your upgrade on other companies findings as it can be totally different depending on what hardware they use.