Also, it is really easy to do the normal IO "syscall wrappers" on top of io_uring instead, even easily exposing a very simple async/await variant of them that s

Also, it is really easy to do the normal IO "syscall wrappers" on top of io_uring instead, even easily exposing a very simple async/await variant of them that splits out the "block on completion (after which just like normal IO the data buffer has been copied into kernel space)" from the rest of the normal IO syscall, which allow pipelining & coalescing of requests.