How accurate / useful do you find this new game rating function

Win percentages for specific rating differences. - Chess Forums

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A Puzzle That Tells YOUR Chess Level - Remote Chess Academy

rating - What do you call average? - Chess Stack Exchange

How to look up your US Chess rating – Indermaur Chess Foundation

What is the average chess grade? - Chess Forums

What is the meaning of ELO in chess (have read the basics in Wiki)? Why not we have basic score points like numbers or grades? - Quora

Magnus Carlsen ranks the World Chess Champions

USCF Rating - what does the W L B D mean and the numbers next to it? : r/ chess