That was my issue with multiple monitors years ago - I'd be cranking my neck over too often (looking at logs, etc). I vastly prefer an ultrawide where I can put logs / monitors on the side flexibly.

I have a 34 inch now, and feel like I could use more space - but it's nice to know there's an upper bound. Do you feel like there's still room to go beyond 40, or is that the sweet spot?