Some days ago I did make a discuss article on would you prefer single ultrawide over multiple monitor setup for your developer needs.
Answers did vary, tho most of you did recommend multiple monitor setup. I wanted to extend the discussion a bit on the vertical (portrait mode) screens and their use cases.
Out of curiosity, I thought it would be nice to share, what do you mainly use them for? To save space? To view more code lines at once? To split screen for multiple tools? For reading external sources, docs?