I have three identical monitors in a row. Primarily I use the center one, for productive work and gaming, but often I'll have something up on the second screen that I'm working with as well. It's more rare that I actively use the third one, but some tasks have more than two or three windows and now I can see all of them full size at once.
I've occasionally used them as a single ultra wide screen for gaming, but since then I've gotten an hmd for VR and that is better.