https://wccftech.com/windows-10-v2004-moving-fast-now-the-most-used-os-version/

Microsoft released the newest version of its desktop operating system, the October 2020 Update, last week. While Windows 10 October 2020 Update (20H2) is being delivered to only a handful of users, the previous version has apparently been moving fast. Windows 10 May 2020 Update, or version 2004, is now the most-used operating system currently holding 37.7% of the market.

"October 2020 Update just started rolling out and it's too early to make any assumptions about its rollout velocity at this point," AdDuplex writes in its latest report. "In the meantime, May Update becomes the most used Windows 10 version out there."