Uh, the butterfly isn't used in Apple keyboards anymore. They reverted to the old scissor switch design some time ago.
It would have been much better if they had figured out how to cut their losses and revert the keyboards in 2016 or early 2017, even though that would have taken a substantial redesign of the rest of the laptop internals.
Selling 4.5 years of laptops with keyboards that broke easily under ordinary use was a huge black eye for the company.
Given that Apple is still selling, or has only just stopped selling models with the latest butterfly keyboard - the issue may have solution, but hasn't gone away. Millions of laptops have faulty keyboards which, when they break, will be replaced with another faulty keyboard. That's an unresolved issue.