Windows 10 20H2 crosses into double-digits.
Windows 10 OS Worldwide (PCs)
October 2020 Update adds close to another 5% to its market share and is on 13.6% of Windows 10 PCs as of the end of December.
Close to 80,000 Windows 10 PCs were surveyed.
Windows 10 OS Worldwide History (PCs)
Windows 10 20H2 grew a bit slower in December than it did in November. We will see if it picks up the pace after the holidays.
Note: we don't have the data for the initial rollout of the first update to Windows 10 (1511, also known as Threshold 2). So it's a straight line from 0 to the first data point we have on August 22nd, 2016.
Source: AdDuplex Windows Device Statistics reports