I have clusters of over a thousand raspberry pi’s that have generally 75% of their compute and 80% of their memory that is completely unused.

That’s an interesting setup. What are you doing with that sort of cluster?

99.9% of enthusiast/hobbyist clusters like this are exclusively used for blinkenlights

Blinkenlights are an admirable pursuit

That wasn't a judgement! I filled my homelab rack server with mechanical drives so I can get clicky noises along with the blinky lights

Good ol' Amdahl in action.

That sounds awesome, do you have any pictures?

Is it solar powered?