https://www.bleepingcomputer.com/news/microsoft/windows-10-april-2018-update-already-installed-on-50-percent-of-windows-10-pcs/

Windows 10 version 1803 —also known as the April 2018 Update— is the fastest spreading Windows 10 update of all time, according to third-party telemetry data released last week.

Over 50% of all Windows 10 PCs now run Microsoft's latest Windows 10 version, according to a report from AdDuplex, an advertising company that collected statistics from around 5,000 Windows Store apps running AdDuplex SDK.