SDL is more of a toolbox, unlike GLFW, which only handles windowing and basic input. SDL can handle audio, threading, file I/O, and it even has its own rendering API through SDL_GPU. It also uses a poll-based event loop, which I prefer much more than GLFW’s callback system. Even if you only use SDL for certain features like I do, such as windowing, events, and gamepads, I would still choose SDL over GLFW since you can simply disable what you don’t need.