At a previous job I had, we were only given options for 1080p monitors. I ended up with a total of 5 and needed all of them.
I think I started on a single 640x480 CRT. Professionally. My actual first computer was 320x200. Now I’m on dual UHD + laptop screen.
Professionally similar; 1024x768 here (might have had an 800x600 laptop or thereabouts).
But when people today complain about how how anything less than 4k x 60fps on some game is unplayable, I remember playing Doom in 320x200 on a 14" monitor, and still having to shrink the screen into an even tinier window, so I could get 10fps.