As the article notes, the increase seems to be driven mainly by users in Asia, where recycling and reusing older hardware is quite common. I wonder if third-party companies are offering extended security patches there, which could make affordable second-hand Windows 7 machines more appealing for people who just need them for browsing or light tasks. It would certainly make sense given recent fiascos and Microsoft’s current stance on AI, especially with generative AI being used to develop system-level code.
Ehh, bots have always presented nonsense UAs to servers. And since modern browsers hard-code the OS version in the UA string, pretending to be an old browser on an old OS could be a (probably ineffectual) way to bypass fingerprinting.