You can safely use C11 or even C18 if you’re not too worried about support beyond Linux, macOS, and Windows with Clang. Game consoles and embedded development

You can safely use C11 or even C18 if you’re not too worried about support beyond Linux, macOS, and Windows with Clang. Game consoles and embedded development might require crappy old compilers that don’t support anything but C89, but otherwise use the latest version you can.