> It decomposes key operating system functionality such as file systems, networking, device drivers and graphical user interface into a collection of fine-grain

> It decomposes key operating system functionality such as file systems, networking, device drivers and graphical user interface into a collection of fine-grained user space components that interact with each other via message passing. This sounds horribly inefficient and slow, even to the point of still being noticeable on modern hardware (especially low-end consumer hw).