I mean that I am a real developer still (and have been one of the world's relatively best paid), and 13" works fine for me to get stuff done. Here I am 200 miles from home in a hotel right now with all my tools. No monitor lugging required.
Yes, laptop ergonomics aren't ideal, but neither is life. There are always trade-offs. And I have some colourful language memories from earlier sysadmin jobs getting horrific shocks while lugging other users' colour CTRs around for them...
I'd suggest that anyone who thinks that they "need" a huge monitor as opposed to "prefers" should considers needs vs wants.
If I was living in a van, and I'm a tiny house fan BTW, a large monitor would NOT be on MY 'needs' list.
Another commenter made a good point about more screen space being more distraction, and debuggers being a big part of that as an example of not solving the real problem. Given that you only have a few cm^2 of full-definition vision anyway, you have to manage that one way or another. More pixels is not necessary that way.
