Completely asinine statement. Functionality of something always comes into play, you might think you want nothing there and then after using it you realize it's exactly what you needed. Apple only has a history of doing this their entire history.
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The first issue I have with everything you've said is you assume this area is "multitasking", Multitasking is a background service, this screen everyone is discussing is the "fast app switcher" up until this point.
I could make the statement that if I want to open a recent app I could open it from the home screen, spotlight, etc. Now do you see how ridiculous you sound? The fast app switcher is faster for this, and it's faster for hitting up a recent/favorite. You just don't know it yet.
If you don't wanna see people in your OS, maybe don't have any contacts? That could solve it. Explains a lot.
What feature did you lose by this entering that space? If you don't think you'll use it, don't... plain and simple. However, you're probably wrong. You usually are. And that's why Apple doesn't give customers the opportunity to change things however they like. If you haven't got that they know the answer MANY times before we do (or at least that's how they operate) you haven't been paying attention.
Out.