What is the reason behind the sudden growth in AI Companies

Artificial Intelligence is witnessing a major revival in the past few years. Various forms of Artificial intelligence have been around us for a long time. We were introduced to the technologies like speech to text transcription, voice recognition etc long years ago. These technologies were not much efficient but they act as a base for the future technologies. Around the 1980s, due to less efficient applications, artificial intelligence consulting saw a major dip in the investments.