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alanying 来自网络
2012: New 2012 MacBook Air, 2012 MacBook Pro, and the first MacBook Pro with retina display.
2013: 2013 MacBook Air, 2013 Mac Pro, and new airport extreme
2017: 2017 MacBook Air update, 2017 MacBook Pro, 2017 iMac, 2017 iMac Pro, 2017 iPad pros, and the HomePod
2019: 2019 MacBook Pro, Pro Display XDR
even in 2020, we got sort of a hardware announcement with the Apple silicon developer transition kit.
either way, within the last 10 WWDC‘s, 5 of them had hardware. So, using that logic, we really do have a 50/50 shot.