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.