no technology is ever totally obsolete

Horse-and-Plow Farming Making a Comeback

... a farmer with horses can earn triple or more the earnings per acre than one farmed by agribusiness.

Ron VanGrunsven farms about 50 acres with horses near Council, Idaho, and has used horses for years there and in Oregon's Willamette Valley.

"They're more economical," he said. "They raise their own replacements, you can train them yourself and raise their feed."

I find that cool.