Using the multitask aspect (with tasks/processes) and the drivers orientation. You can develop easily multitasked applications.
And for the end user, he benefits of the freedom to install any interfaces he wants, to easily install/desinstall programs. And to use pipboys in Fushell to manage packages and install new applications easily.
In term of startup speed, there isn't better for what all of Fuchas is capable. Multitasking usable on slow machines. And fast interfaces! Say goodbye to the slowness, and enter Fuchas!
It is also an OS containing a lot of libraries inside it for developer usage, which is permitted by its low base size (the OS is only 150KiB). For example, it contains liburf, a reader + writer of uncompressed URF archives