Interesting read, found elsewhere (some people should know David Heinemeier Hansson):
Just over a year ago, we announced our intention to leave the cloud. We then shared our complete $3.2 million cloud budget for 2022, and the fact that we were going to build our own tooling rather than pay for overpriced enterprise service contracts. The mission was set!
A month later, we placed an order for $600,000 worth of Dell servers to carry our exit, and did the math to conservatively estimate $7 million in savings over the next five years. We also detailed the larger values, beyond just cost, that was driving our cloud exit. Things like independence and loyalty to the original ethos of the internet.