In 2024, if you called a company’s support line and got routed to a “voice agent,” you knew you were talking to a machine within the first few seconds. A few seconds of dead air between your question and its answer and it was obvious that software was on the other side of the line. Two years and several billion dollars of funding later, those telltale signs are disappearing. The best voice AI systems today are good enough that people fail to identify them in blind tests not occasionally, but…