I’ve seen stock traders where everyone on the floor had half that many. A few of them had 9.

When they’re looking up trades or news, they open a ridiculous number of windows while doing research.

They have 4 screens just to watch the markets and handle in-house controls.

What’s striking about this is the amount of whitespace on the screens. They are only using 1/2 - 1/4 of their screen space.