I actually like having multiple screens. I know I'm weird in this but I actually like running certain apps maximized.. but I wouldn't want it maximized across a whole ultrawide.
Plus, if I take a working vacation somewhere it's a lot more practical to schlep around one 24" or 27" than an ultrawide.
Also, just as an ergonomic thing, I could angle in the two outer screens a bit while not having one of those icky curved screens.