Simple DirectMedia Layer (SDL) is one of the most important pieces of open source for Linux gamers, as it's the tech used by various game engines and games. It's also about to continue changing the game for the Linux desktop in the upcoming version.
What does it actually do? It's a cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware.
It has been announced that the SDL 2.0.22 will default to Wayland, preferring it over X11. This is another big step towards Wayland properly being a replacement for the old and crusty X11 everywhere. With this we might end up seeing more games and applications be native to Wayland, rather than having to run through XWayland.
Developer Ryan C. Gordon (also known as Icculus) mentioned on Twitter: "If you or your distro has not supplied a libdecor, you absolutely want to get that in place by around March 2022". A lot of the heavy lifting involved was done by Ethan Lee (also known as flibitijibibo), who mentioned on Twitter that almost all of the work involved was funded by sponsors of their GitHub.