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I've had the ability to do split screens on my Note 4 and Surface Pro 3 and have yet to actually use the feature in over six months.
I have split screens on my Note 3 & 4, plus my Surface Pro, I use that feature constantly. It was a deciding factor and deal _maker_

Further proof that we have unique and different needs, I never criticize what I don't use or need, I celebrate choices.
 
Sitting with my cracked, slow 4 tempted to jump with the 6S.

Always liked the 'S' improvements.
 
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