I regret building this $3000 Pi AI cluster

If Pi Clusters were actually cost competitive for performance there would be data centres full of them.

Like the joke about the economists not picking up the $20 bill on the ground?

Faith in the perfect efficiency of the free market only works out over the long term. In the short term we have a lot of habits that serve as heuristics for doing a good job most of the time.

> Like the joke about the economists not picking up the $20 bill on the ground?

For those like me that don't know the joke:

Two economists are walking down the street. One of them says “Look, there’s a twenty-dollar bill on the sidewalk!” The other economist says “No there’s not. If there was, someone would have picked it up already.”

Presumably the non-economist following them picked up the twenty, unencumbered by theory.