It does support "modern gaming" yes, but like the sibling comment mentions, at least Riot's anti-cheat demands Windows 10 22H2 (the last iteration of Win10) as a minimum. There are a few somewhat convoluted workarounds floating around that people use. Also Adobe CS seems to require Win10 22H2.
There used to be a website something like "windowsserver2008gaming.com" or something like that idr the specific domain, that was literally a guide to turn old windows server OS installs into gaming computers. The golden years.
My only caveat is that I’m not sure how it handles multiplayer games that require anti-cheat or DRM-style mechanisms, but it’s been flawless with every title I’ve thrown at it so far (BG3, Shadow of the Tomb Raider, Cyberpunk, Ori, etc)
I don’t feel particularly chained to proprietary software just by playing games. I play all of them on Linux using open source software.
Yes, the games themselves are proprietary, but that’s because they’re primarily art pieces, and proprietary licenses makes some logical sense in that case.
It's actually a question relating to what some people want to do with their computer. Most people don't run an OS because of some moral objection to other OS's but because it lets them do what they want with their device.