Thanks for your input! It seems many of the PES 2021 patches are now incompatible with SteamOS because Wine cannot emulate a required function of the CPK Protection Toolkit verification process and EA FC 25 (if it’s worth playing) is also incompatible with SteamOS, so I see some advantage to a Windows native handheld.
I’m also somewhat confused that when I watch videos of people playing PES 2021 at 4k from YouTube on my iPhone 16 Pro Max, it looks absolutely gorgeous, yet on my Steam Deck LCD, even at high settings, it appears grainy and dull. It feels like the Steam Deck is rendering just enough to look good at 800p and the recorded videos are rendered at an insane resolution then scaled back down. This makes no practical sense but I have no better explanation of how the rendering quality of the same game could vary so dramatically.