I have 3 screens on my laptop at work.
Laptop 15 inch screen (center and primary), laptop second display drive is a 19 inch LCD to my right (secondary) and a USB 2.0 Triton driven 19 inch display on my left.
The Triton display has a horrible refresh rate, so movies are a definite no-go. But, for typing letters, or cutting and pasting from that display to my primary - it’s almost perfect.
So, material I refer to frequently for reference goes on my left hand screen, center for working on, right hand screen for research and simulations.
Can’t imagine going back to 2 screens.
I want a setup like that....and going thru a KVM switch....