Many reviewers regarded Y2K as inferior to Kopit's other notable works, such as Oh Dad, Poor Dad, Mama's Hung You in the Closet and I'm Feelin' So Sad, Wings, and Indians. John Simon wrote in New York Magazine that Y2K is not a believable story and not of the same quality as Kopit's respected works. McNulty observed in Village Voice, "Kopit makes things somewhat more confusing than he needs to." Sommer in CurtainUp called Y2K "a thriller that fails to thrill" and compared it unfavorably to John Guare's Six Degrees of Separation and Craig Lucas's Dying Gaul, complaining that Kopit's play "has none of the complexity and depth of either." She concluded, "Presumably the resolution that never comes is intended to leave you pondering the issue of our eroding privacy. . . . In point of fact, you're simply left feeling you've had an unsatisfying meal...