Why is filter white items still in the game?

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Malgrif wrote:

people should learn to press the z key... by default it's bound to switching show items on and off... if there are too many items on the screen while fighting, then press z so you can finish the fight before looting.

I don't want to hide all items, just the useless ones.

What items are useless is entirely up to me, and I should have the option of choosing what to see and what not to see.

There really isn't any argument against such a feature other than the amount of development time it takes to implement it. It doesn't do anything negative to those who don't want to use it.