There are no cashiers, and no lines, in this store. (Photo by Spencer Platt/Getty Images)Getty ImagesOnce upon a time, Amazon tried to build a physical-store kingdom: cashierless convenience in Amazon Go, grocery at Amazon Fresh, Amazon kiosks in malls for small electronics, Amazon 4-star for I-never-understood-what, fashion at Amazon Style, deals-of-the-day at Amazon Treasure Truck and Amazon Books. For a while, it looked like Amazon’s playbook might work: expand fast, learn new skills and win big. And the ...