This startup died in 2017, but its dream of in-ear computing is everywhere

Few elements of Silicon Valley’s culture are more cherished than its embrace of failure. Nobody looks askance at you for starting a company that doesn’t make it. Indeed, it’s widely regarded as a badge of honor, proving your willingness to make bold, risky bets and leaving you a smarter, more battle-tested veteran. And yet failed startups tend to be forgotten the moment their doom is sealed. Aside from a few flops so epic they become legends—hello, Webvan and Humane—defunct businesses quickly...