Investors got a fresh perspective on the state of the AI revolution, and they liked what they saw.The mad dash to adopt artificial intelligence (AI) began in earnest early last year, driving impressive gains for those companies best positioned to profit from this sea change in technology. The resulting bull run among AI stocks has helped sustain the ongoing market rally.In recent weeks, however, some investors have begun to get skittish, wondering how long this relentless run could go on and looking for evi ...