Investigating wear of POM (Delrin) 3d printer wheels, and if PC (polycarbonate) are better?

I think the title sums it up pretty well but I feel compelled to write stuff in here anyway. This video is my attempt to remove this myth from the internet, that "it's just dust" on the rails where the wheels go.
It's not, and I brought receipts.


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Credits for music:
Odyssey by Kevin MacLeod
Link: https://incompetech.filmmusic.io/song...
License: https://filmmusic.io/standard-license

Destiny Day by Kevin MacLeod
Link: https://incompetech.filmmusic.io/song...
License: https://filmmusic.io/standard-license