https://www.pcgamer.com/microsoft-tells-how-it-rolled-out-its-april-2018-update-to-250-million-users-in-record-time/

The goal Microsoft set out for itself with Windows 10 is to deliver two major updates every year, with monthly security patches in between.  There have been five big upgrades since Windows 10 launched, the most recent of which is the April 2018 Update, which many people thought would be called the Spring Creator's Update. What sets it apart, however, is not the name but how quickly Microsoft was able to push it out to hundreds of millions of PCs.

In a blog post, Microsoft said the April 2018 Update is now sitting on 250 million devices, taking just over six weeks to hit that mark. It's the fastest roll out of any previous upgrade to Windows 10. In fact, the previous Fall Creators Update took twice as long to reach that many devices.