I have some games which work on Windows only, but I don't want to buy a new Windows, I would rather keep Windows 7 as a second OS for gaming and use Linux or BSD for working, browsing, etc. As far as I know vulnerabilities in multiplayer game clients are very rare, so there is only a very low chance that somebody hacks the system while I am gaming. Some people argue that it is a massive security risk that I keep an EOL OS even though I would not use it for browsing, just for playing the old games I downloaded from safe official sources. I don't agree, because I don't think such a system has a big attack surface, but I am curious what do experts say?
update based on the comments
Looks like game clients are not safe at all: https://www.networkworld.com/article/2166509/researchers-find-critical-vulnerabilities-in-popular-game-engines.html
Still this is not a Windows 7 related issue, I guess Windows 10 can be hacked through these game vulnerabilities too. So the question remains, for this specific game only usage does Windows 10 give any security advantage over Windows 7 and if so what?