You spend 50 billion to build a 1GW data centre, and then the entire thing breaks or wears out in 5 years. So you need to earn like 20 billion per year to get some return, but there's only like 100 billion in this (https://www.wheresyoured.at/dont-look-up/), and most of that is Open AI and Anthropic burning through VC funding

Note 1: these numbers are a bit vague, but this is one of those problems where the answer doesn't really change if you're off by 20%

Note 2: buy popcorn