VKD3D-Proton 2.9 “Greatly” Reduces System Memory Requirements, Improves CPU Performance

This, along with plenty of bug fixes.
Proton Experimental Adds Support for Super Bomberman R, Fixes Portal RTX

Street Fighter 6 also gets a memory leak fix.
Project+ 2.4 Adds New Stages, Costumes, Fixes Several Bugs

Some characters also received balance adjustments.
Lutris 0.5.13 Adds Support for Proton, Increases Responsiveness

Plus Itch.io integration and many other features!
Steam to Ditch Google Analytics in Favor of Their Own Solution

“We’ve come to realize that Google’s tracking solutions don’t align well with our approach to customer privacy.”
Steam Deck Updates Fix Splitgate, Adds Performance Improvements

Four client updates and one SteamOS update.
DXVK 2.2 Introduces D3D11On12 Support, Improves Compatibility with Game Launchers and Visual Novels

Shortly after the release of D8VK 1.0 comes DXVK 2.2. It’s a pretty hefty update that “introduces support for creating D3D11 devices from a D3D12 device,” improved compatibility with game launchers and certain visual novels that use Microsoft’s WPF toolkit, less redundant logging, along with plenty of bug fixes.
Keep in mind that even though there is improved game launcher compatibility, there is “a noticable performance hit.” Users are encouraged to report the full Proton log when filing bug reports.
ChimeraOS 42 Adds Support for Aya Neo 2, OpenGamepadUI

Plus GPD Win 4 controller support and several bug fixes.