翻到文章的最後面可以看到「Information as of 2019-05-21」，不過剛剛才在 Hacker News 上看到這則消息：「Apple's service program for butterfly keyboard MacBooks, even out of warranty (support.apple.com)」，官方網站的說明在「Keyboard Service Program for MacBook, MacBook Air, and MacBook Pro」這邊：
Apple has determined that a small percentage of the keyboards in certain MacBook, MacBook Air, and MacBook Pro models may exhibit one or more of the following behaviors:
- Letters or characters repeat unexpectedly
- Letters or characters do not appear
- Key(s) feel "sticky" or do not respond in a consistent manner
Apple or an Apple Authorized Service Provider will service eligible MacBook, MacBook Air, and MacBook Pro keyboards, free of charge. The type of service will be determined after the keyboard is examined and may involve the replacement of one or more keys or the whole keyboard.
機型從 MacBook (Retina, 12-inch, Early 2015) 到最近的都有，可以從系統選單上面看到。時間上只要是售出四年內都包含在內，而且先前如果有因為鍵盤維修的也可以試著申請退費：
This worldwide Apple program does not extend the standard warranty coverage of your Mac notebook.
If you believe your Mac notebook was affected by this issue, and you paid to have your keyboard repaired, you can contact Apple about a refund.
The program covers eligible MacBook, MacBook Air, and MacBook Pro models for 4 years after the first retail sale of the unit.
