David Heinemeier Hansson saved over $1 million annually by moving Basecamp and HEY from public to private cloud, and his math is solid. Today we examine why his approach worked, what everyone else needs to consider before following his playbook, and the hidden costs of managing your own infrastructure. Plus news: NPM’s AI-targeted malware with 86,000 downloads, Python’s UV tool revolution, and a mathematical curiosity about consecutive digits.