Interesting - Apple seems to acknowledge the 2016/7 MBP keyboard disaster. They've patented a method for preventing a speck of dust from destroying them:
https://www.theverge.com/2018/3/9/17100594/apple-patent-dirt-debris-liquid-snacks
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This might be the worst keyboard ever. Why? The thing is people still believe that dust cause issues related with recent keyboard, but in fact most of problems comes from faulty design.
They've pathented something which is supposed to make crumb-resistant keyboard, waterproof...etc, but if you would like to take it apart and just repair selected keys it might be the worst experience as you ever had with keyboards.
I hope it won't come out. This design, this mechanism.