@eugen-b, LOL! She's still running 7 (I think). Once they get a development platform setup, code monkeys don't like making many changes to their systems.
She prefers FF for her daily use, anyway, but if she also happens to provide web services for her clients she has to test it in various Windows web browsers. But not Edge. I guess you need Win10 to run Edge, or so I think I've read. She was an analyst/programmer long before Windows arrived, so she still irks at restrictions like that.
Developers develop. They don't want changes to whatever platform they use--no sir! Distrohoppers hop, and a different one per day is too much for coders to handle. The thought would make their heads asplode!
So she codes Windows applications and markets web services to new start-up businesses. (Shameless plug: https://www.kickthewind.com/ )
I'll never be able to influence her to change to Linux and gave up long ago. Well, except for LAMP servers. She's pretty good at setting up LAMP servers...