> Unless we have a solution that is significantly better than POSIX/UNIX, switching to anything else incurs a significant cost that no one is willing to pay. T

> Unless we have a solution that is significantly better than POSIX/UNIX, switching to anything else incurs a significant cost that no one is willing to pay. The problem is that it doesn't even suffice for the new thing to be "significantly better". Because of the huge sunk cost, the new thing needs to be able to do desirable things that a POSIX-compatible OS strictly cannot do. Otherwise, it will always be easier and faster to just glue another subsystem onto the Linux kernel and continue using that.