Mezcal is booming, in part because it has roots. In the US, mezcal's top market, where the old is routinely torn down to build new, roots resonate with a certain type of consumer. Enough of us are not as enamored with the new, as its promoters would care to acknowledge. Take houses, for example. 100-year-old houses take work to restore and work is expensive. Old houses require problem-solving and work-arounds. They require a level of patience and willingness to tolerate quirks that most people don't want to be bothered by. They require respect, in other words. New houses are easy.