> is not desirable for most photography applications Hardly. It's namely portraiture that benefits from thin DoF, or similar applications where figure/ground

> is not desirable for most photography applications Hardly. It's namely portraiture that benefits from thin DoF, or similar applications where figure/ground relationship can be improved by keeping OOF elements blurry. There are a great variety of situations where you do want as much in focus as possible. Landscape and macro photography are the most notable examples, where most high-level images utilize focus-stacking composites to simulate extreme DoF. Certainly focus depth is a creative tool, but don't confuse expensive wide-aperture lenses for what is necessarily good.