^ That's just it, a vague assumption that it's living dangerously when it isn't. The systems I have win7 on, have modern browsers. It's not about "go back to unsupported 7", rather not updating a system to a newer OS without some good reason and security just isn't one for the typical home environment. At the same time, I wouldn't put Win7 on a new build but that's more about driver and app support.
Did you know that Microsoft Security Essentials is still updating on Win7? Heh, I even consider just disabling that because it's never been needed.
RIght now if you're running Win10, at some point in the future there will be newer windows versions too, and you're going to think "oh noez you can't run win10, have to run win12 because 10 isn't secure"... yet you want to suggest 10 for security today?
I could put a Win95 box on my network and be secure, if only it had modern browser support. Keep it from using the ancient integral IE like when apps invoke an instance of it, and it's secure enough too.
Look at it another way. There are many people running older OS than Win10. Find me a real world example where someone doing normal things in a home enviroment was exploited due to using Win7, rather than some other problem. There must be examples if it's a legit threat, right?
I can find examples of peoples' homes being invaded but right now my door isn't locked, nor do I have a shotgun pointed at it, and I'm not updating to the latest greatest locks, reinforcing every door and window frame, or getting a guard dog either. I'm not even wearing a tin foil hat. Meh I guess I'm just used to living dangerously, lol.