But do we have an authoritative and empirical source indicating a meaningful increase in keyboard hardware problems? Apple has that information, and they've de

But do we have an authoritative and empirical source indicating a meaningful increase in keyboard hardware problems? Apple has that information, and they've decided it's a big enough problem to issue a repair program and adjust the keyboard in the new version: https://www.apple.com/support/keyboard-service-program-for-macbook-and-macbook-pro/ https://www.apple.com/support/keyboard-service-program-for-m... So, in answer to your question, yes we do have an authoritative source - Apple.