You would have to write your IO to have a fallback. The Ghostty project uses `io_uring`, but on kernels where it isn't available it falls back to an `epoll` mod

You would have to write your IO to have a fallback. The Ghostty project uses `io_uring`, but on kernels where it isn't available it falls back to an `epoll` model. That's all handled at the library level by libxev.