The time is up for the over three-decades-old business model with the advent of artificial intelligence, HCL Technologies' chief executive C Vijayakumar said on Monday.Speaking at industry lobby grouping Nasscom's annual NTLF event in Mumbai, Vijayakumar said companies need to be "paranoid", given the wide-ranging impact of AI and stressed that this attitude will help them to be relevant and grow."I strongly believe that the business model is ripe for disruption.