If you have boundaries, it stimulates creativity. If you have everything all the time, it’s easy to continue producing the same thing
— Magnus Nilsson

In the past, the tools of photography place rigid limitations to how photographers could create. Did you load the camera with black and white or color film? Did you only pack a set number of rolls or sheets of film? Is the film the right speed to get the shot? Photographers chose their limitations when they pack their bag. 

Now, photographers must voluntarily impose limitations on themselves. Yet if our expanding waistlines are any indication, we struggle adhering to those.