… if you know how to use virtual desktops and shortcuts. You can’t look at two screens at a time, anyways.
One use case I can understand is having a 2nd monitor for checking stock prices or checking for a certain event. Other than that, I don’t see how it contributes to “productivity” while working or coding for example.
P.S: Tiling WM users may understand this post more
Back in my days we only had space for one crt screen on the table so that’s what we used and we liked it!
Nowadays I’d rather have a second screen though. Not essential but there’s no real downsides either.