They replaced the butterfly keyboards free of charge. I know, I had that done. No AppleCare. Sure, it wasn't like that initially, but pretty much invariably, they always end up having a service program for these types of issues.
So this whole notion that they build some issue into their machines is total bunk. They (Apple, that is) end up paying for that... whether it's a faulty GPU, screen coating, batteries, keys... there always is a service program that is implemented and it usually lasts longer than any AppleCare plan would cover.