The latest ChatGPT-4o (2025-03-26) jumps to #2 on LMArena, surpassing GPT-4.5

I mean, it's awesome, kinda, I think. Dunno.

Honest question, but why is it that important on which rank an AI is? Why an ranking at all. How to measure it? With coding questions, common sense questions? Why?

Personally, I enjoy if I can talk with AI, have it help me code here and there, nudge me in the right direction or having it writing me some good story I ask it about (which is also the reason I like ChatGPT).