Command key worn through to the white underlayer
The black coating in the center of my left command key has worn through to the white underlayer.
I use that key a lot with my thumb while reaching for other keys in the top left corner, so the side of my fingernail is cutting into it.
Enough to have literately dug a hole into that key!
Same issue as stated by someone else in a previous post here: https://discussions.apple.com/thread/250253504
MacBook Pro 13″, macOS 11.6