Apropos of nothing…

Was staring at my keyboard, and noticed that I have worn off about a quarter of the C sticker on the C key.

Nothing else is worn away on this keyboard, but the A S E R T N and spacebar keys are shinier than the other keys.

Looking at my laptop, which ancient in technology terms, I’ve worn away the C and S and C stickers, and the A E R T H I L N and spacebar keys are very shiny.

So I’m curious, is this wear normal on all keyboards, or is it a function of how I type (which is NOT to touch type, as I never learned.)