As of April 2024, Android, a mobile OS that uses the Linux kernel, is the world's most widely used operating system. It has 42.73% of the global market, followed by Windows with 28.08%
And these numbers don't include embedded devices, of which there are a metric fuckton. So, non-Android Linux might be ahead of Android, too.
This is going to be an absolute shitshow when free updates stop and people refuse to pay beyond the ten years of support Microsoft announced back when Windows 10 was released. I hope browser manufacturers give 10 the XP treatment or Windows 10 computers are going to be a malware minefield.