I agree, two is probably the productive limit as long as you only have one mouse cursor. But I just got a dual screen laptop with touch on both. I can easily slip between a soure document, destination document and have a web page or other tool open for research it’s kind of classy.
I find 2 per PC is my useful limit. Which means my current 5 isn’t quite enough. Monitor arms are always a challenge at that scale, though.
I agree, two is probably the productive limit as long as you only have one mouse cursor. But I just got a dual screen laptop with touch on both. I can easily slip between a soure document, destination document and have a web page or other tool open for research it’s kind of classy.