I wish the plastic Apple uses for keys was as good as the electronics and the cases. I had vowed never to buy Logitech keyboards and mice because their electronics are fine, but their plastic cases are so poorly engineered those devices collapse within a year. By comparison, one can get many years of an Apple keyboard. The aluminum cases are solid.
The keys, as you see, are now rather grating to use, and the notches gradually disappear, making it harder to touch-type. I see individual keys offered on eBay. They seem to be salvaged, not new.
If Apple declines to change them officially, how much skill is needed to replace such a key by the end user? Is the plastic underneath particularly breakable?
OK, I see that ifixit says: "Keys can be easily [italics added] removed by using a scalpel or fingernail under the left side and lifted."
Is this "easy" by ifixit's standard only? Have you succeeded in replacing several such keys without getting one broken? (which would render the entire device useless).