By drawing on the results of other models, distillation can shape AI that’s almost as good, quickly and more cheaply. WSJ tech reporter Miles Kruppa says that has investors worried about the risks of pouring money into the field’s cutting edge. And retail reporter Kate King says that while Amazon may be the champion of online retail, its recent store closures show it hasn’t replicated that success in the bricks-and-mortar space. Pierre Bienaimé hosts.

Sign up for the WSJ's free Technology newsletter.

Learn more about your ad choices. Visit megaphone.fm/adchoices