https://www.theregister.co.uk/2019/05/22/apple_macbook_pro_butterfly_keyboard_mechanism_new_material/ > Apple has such confidence in the new MacBook Pro's reimagined butterfly mechanism that the laptop qualifies from day one for inclusion in its expansive keyboard repair scheme. > The mechanism, introduced in 2015, hasn't gone down well with users who complained of frequent failures – missed keystrokes and double presses of keys – leading to a petition calling for a recall on Change.org and lawsuits filed in the US.