Depends entirely upon how exactly it's broken, and how the mode is enabled. If it's done in the settings app, then as someone else here pointed out, a broken s

Depends entirely upon how exactly it's broken, and how the mode is enabled. If it's done in the settings app, then as someone else here pointed out, a broken screen would make that a bit pointless. If the mode can be enabled other ways (button combination, something via USB, etc) preferably in multiple possible ways, then it could be extremely useful.