the most commonly used OS for NPM (by humans).
Upgrading from Node 6 to Node 8: a real-world performance comparison
David Gilbertson

This statement may be misunderstood by many. When most people say ‘use npm,’ they’re talking about the package manager + registry. You know, the Node Package Manager, used by humans for JavaScript development. That tweet is talking about people _visiting the website_ having a Windows majority.