How would you know if the keyboard has been fixed? You'd need to collect statistics on hardware failures for a while to be sure. Extrapolating from data we have I guess that around 2-4% of 2016/2017 laptops suffer from the keyboard problem in the first year, for earlier models it is around 1-2%...
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The performance leap is not as impressive as some might think and many users won't notice it. Its just Kaby lake with two cores slapped on top of it. If your workflow can utilise multiple cores — great, you'd see somewhere between 20-40% improvement. But single-core performance is the same from what we've seen so far.