https://wccftech.com/previous-windows-10-versions-report-usage/

Monthly Windows 10 stats from AdDuplex are out showing an interesting update. Unlike the usual slight increases in the latest versions and previous versions losing a point or two, this month shows very old versions of the operating system gaining more usage.

"One interesting tidbit is that usage of all old versions of Windows 10 increased a bit since last month," the report noted, adding that it could be due to the increased usage of otherwise not-so-regularly used devices.