I had a 17" powerbook for years with a width of 1440 and it drove me mad because I couldn't quite get 3 80-column terminals to fit comfortably (I think I settle

I had a 17" powerbook for years with a width of 1440 and it drove me mad because I couldn't quite get 3 80-column terminals to fit comfortably (I think I settled on 2 79-column and one 80). Today my minimum width is 1600 pixels, precisely because the way I develop involves having multiple files open, each in their own terminal, all side-by-side. I can never understand people who only have one file visible at a time, but I guess they'd probably think I'm mad too... As for height, how many lines of code do people put in a function? In the languages I tend to use, functions of more than fifteen or twenty lines are a bit excessive, and probably need to be refactored. Why is there so much demand for vertical real-estate?