I switched from 4x 1080p displays for work (1 over 3) to a 4k, a 1080p, and the laptop screen.
The 1080p is mostly for screenshares in meetings. Since most people don’t have 4k monitors, sharing a 4k display in a meeting is a terrible experience for everyone else.
But I’d much rather have “one big display” than the same real estate on more screens. Much more flexible with layout. A 4k monitor is the same number of pixels as 4 1080p screens, and I’ve got one 43” monitor (TV) instead of four 23”.