I'll give you a cast-iron reason why there should be a 'close all' button: because there's a way of closing apps one by one.
Likewise whenever there's a delete button there should be a 'delete all' button (with appropriate safeguards if necessary).
Reason being, the only other way for people to close/delete all is to do it one by one (or three by three in this case) and that's not user friendly.
Likewise whenever there's a delete button there should be a 'delete all' button (with appropriate safeguards if necessary).
Reason being, the only other way for people to close/delete all is to do it one by one (or three by three in this case) and that's not user friendly.