The new nylon switch covers are curious, but I’m particularly interested in the apparent difference in the metal dome switches in this model. It would make sense that they could be a primary culprit for the failures in previous models: they physically activate the key press, which would correlate with a higher failure rate for keys pressed more often.
Of course, that doesn’t resolve dust ingress issues that are directly related to the low travel distance for these keys. But at least a materials failure may no longer be an issue. If I were in the market for a new computer, I’m still not sure I’d trust these. Including them in the keyboard repair program — which is basically four years of AppleCare solely for the keyboard — is a comforting measure that, yes, you can buy these Macs without worrying that you’ll have to pay $800 in a year for a full top case replacement because your space bar is stuck. Still, a no-cost repair is no replacement for a reliable keyboard.