I am a compulsive screen maximizer. Start menu bars are set to auto-vanish on my screen, and the app rules the day. If you think I ever see my desktop, I have to disappoint you. Plasma widgets are useless on my computer, and frankly I don’t understand how anyone ends up having enough screen real estate to see the background picture they chose, unless there is a sudden crash of an application.
That leaves no room for a clock to be visible on my screen. A clock is one of those things you really need, once in a while, but unless it’s “once in a while,” it’s perfectly pointless.
Like the title bar on windows. You got the app icon, the title, and the close/maximize area, but otherwise it’s a waste of space.