I really dislike UI that I almost never need take up extra space for no reason in almost every application. One main point of my app is to have absolute minimal UI. Most of the time, there is no UI at all, only the exact content I want to see, nothing else.
I know a program that provides similar functionality (though it still always has a window border, which I find unnecessary as well ..), but I need some other tools that it doesn't provide, so I started writing this. The status (bar) should only be shown when the user (probably myself) explicitly requests some extra information, which most of the time I don't need so it would just be in the way most of the time. So special needs I guess