Statistics gathered from over 11 million enterprise users reveal Windows 10 market share is growing. Windows 7 usage dropped from 65% of all Windows users in 2017 to only 27% in 2018. Windows 10 has 48% market share among all Windows enterprise users, Duo Security says. Windows is not in as bad of a shape as other OS users, such as iOS and Android users running older versions of their respective operating systems are bigger than Windows. Firefox Mobile was by far the most out-of-date browser employed by Duo, with 95% of users using it using an outdated version.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10-gains-ground-in-enterprise-environments-while-windows-7-crashes-out/