All this digging is old technology some say. Newer ideas have evolved through the Permaculture movement where "no digging", and "grow what you can on top of the hard pack" dominate the movement. But for me, gardening is more than creating food and providing habitat for creatures that live above the ground, I am tending to the needs of the amazing life that thrives in the soil deep beneath the first few feet of top soil. I am cutting open the hard crust of human civilization to help emancipate, beneficial fungi, earthworm colonies and beneficial microbes.
See video on mycelium at this link: 6 ways mushrooms can save the world with Paul Staments
link to www.ted.com