alt Hacker NewsSDL3 switch makes sense given how much SDL2 was showing its age around GPU API abstraction (Vulkan/Metal support especially). Curious if this fixes any of the longstanding input lag / alt-tab issues that Java Edition has had on Linux, since that's usually where the windowing/input layer causes the most pain.
They actually switched from GLFW. In that case you would naturally pick SDL3 and not SDL2.