alt Hacker NewsProper file locking, asynchronous operations across everything, ACL based security, proper ABI.
Not being an OS from C to C as the main programming model.
And then on top, multiple levels of sandboxing, including virtualization of drivers and kernel modules.
Ah and RDP is much nicer than X Windows or VNC.
Other than possibly proper ABI, and yes a tiny handful of file operations that could theoretically block not available through io_uring, like ioctl and splice, Linux has the rest.