They should just run Linux, but if they have to do Windows then 7 is just as good as 10 now, they're both equally unsupported. Blame Microsoft for fucking up 10 and 11 so bad nobody is willing to run them. If they had at least left 10 alone people would still be using that but they're too greedy for everyone's data and they couldn't leave well enough alone. It's also not like there aren't an absolute ton of Windows 10 and 11 installs that are part of bot nets. Running a new version of Windows makes it slightly harder to get rooted, but doing stupid stuff no matter what you're running is ultimately the problem, not the version of Windows. The age of worms self propagating through service 0-days is largely over, it's almost all phishing and trojans these days. It would be one thing if we were talking Windows 98 or XP, but 7 is fairly solid out of the box.

That's not how it works, especially since everyone doing this is behind a modern router.

Nothing will happen if you have a Windows 98 computer connected to the internet when the home internet router is on default settings. And modern internet browsers implement security in themselves on systems they still support.

Firefox still supports Windows 7 via the ESR channel, and every new install gets redirected to on automatically on Windows 7, 8 and 8.1.

Worry the unsupported systems behind pure internet or providing public internet services, or the users installing the free PDF editor Google advertised as first in search. Those are many more than older Windows enthusiasts.

Sounds like the systems you are using should focus on that problem and not how to integrate ads and AI into everything. While trying to extract every molecule of value for shareholders.