Debugging, mainly. And really really dirty and fast workflows, when you don't have time to do pretty graphics. The other thing is not depending on GUIs, librar

Debugging, mainly. And really really dirty and fast workflows, when you don't have time to do pretty graphics. The other thing is not depending on GUIs, libraries, and stuff, makes it resilient and usable in hard conditions (e.g. if you accidentally remove some core system libraries but you still want to see a graph)