Better support for games in the future vs better support for every game released so far to date. Theoretical future benefit vs current real benefit? Pretty obvious to me.
I am not saying that Windows 7 is a good choice 20 years from now but it is the better supported OS for the vast majority of games right now. Unless the OP never plans to play older games, you can't dismiss Win 7 so carelessly.
The test I use for usability is if I am stuck on a island and I could only pick one OS and the software that works on it, it would be Windows 7, not Windows 10.
XP users say same thing about their games library over Win7, end of the day, gaming is fine in general and is always blown out of proportion by some users,99% of time it's normally a driver issue with some sound cards that is the culprit.
I've yet to find a game I can't play on my games library and I've been saying that since XP days, nothing changes around here with some comments.
I can and do dismiss Win7 for older games, fact is my games library goes back to DOS 6.22 games ands yes I play most DOS games on Win10, trying doing some research, not hard to get a lot of old games running on any OS.
Right, off to play XCOM-Apocalypse, btw that's pre Win98 game that I play on Win10.
Last comment, if I wanted every game to work regardless then I would probably have DOS 6.22,Win95,XP,Win10 in a multi boot system, but then that would cause more headaches then it is worth with drivers etc...