I went from 3 to 2, as I went from 2x24@1080p + 1x34@1440p to 2x32@4k. I the jump to 4k with such large screens meant I have a massive more amount of usable screen real estate especially as I do not use any scaling on the screens, although I do marginally increase the font size. I can manage six windows per screen all neatly tiled as long as its not my IDE, that I need a good 2/3rd of the screen to actually be useful for me.

It would be unmanageable if I tried to do this without a proper tiling window manager though, I use Sway. I particularly like how the virtual desktops work on Sway as I have separate virtual desktops per screen, makes them actually useful for me. Typically I have two per screen, IDE/Terminal and Discord/Signal/Music, Multiple Browser windows and Email/Teams/Office.