21' Kronos XTR diff cup wear ie is this normal?

[crash_194]

I find it weird that it's really only the diff input/output cups.. the rear stub axles don't show any wear,yet they're not the spring steel?
My xtr has had the spring steel cups for a while now, holding up great.

Great news that the spring steel is holding up and yes you are right, it is literally only the central drive where I am having this issue, drive going to the wheels is showing nowhere at all yet.