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Details are missing in the linked techradar article, but covered in its source [1]. To summarize, futex2 (for faster Windows-style locking) and syscall user redirection (for supporting odd DRM constructs) may land in Linux 5.11.
[1]
https://www.phoronix.com/scan.php?page=news_item&px=Extendin...
I haven't been a gamer since Quake was released in the 90s. I switched to Linux and tried steam. THere's another program you have to install like "proton" or something like that which will run the windows-only games on Linux.
I tried call of duty and although I'm terrible it seemed to work fine on my laptop.