1) Because then I have to move the mouse to click on tiny UI elements and that takes a long time. 2) Because then I need another browser window open and that t

1) Because then I have to move the mouse to click on tiny UI elements and that takes a long time. 2) Because then I need another browser window open and that takes up more screen real estate than a terminal 3) Because my browser background is white and reading code on it is less pleasant 4) Because then the place where I say "run these backend tests" and the place where I pop into the debugger are different.