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Technology may not replace humans, but it could make a 3-day work week possible — at least, that's what Bill Gates thinks.

The billionaire joined Trevor Noah on his "What Now?" podcast in an episode that premiered on Tuesday. When Noah asked about the threat of artificial intelligence to jobs, Gates said there could one day be a time when humans "don't have to work so hard", Business Insider reported.

"If you eventually get a society where you only have to work three days a week, that's probably OK," Gates said.

There could exist a world where "machines can make all the food and the stuff," and people don't have to work a five day-plus work week to earn a living wage.

While artificial intelligence could bring about some positive change, Gates has previously acknowledged the risks of AI if it's misused. In July, he published a 3,000-word blog post about the potential impact of AI.

"I don't think AI's impact will be as dramatic as the Industrial Revolution, but it certainly will be as big as the introduction of the PC. Word processing applications didn't do away with office work, but they changed it forever," Gates said at the time. "Employers and employees had to adapt, and they did."

Companies in the US and abroad have been testing the effectiveness of a four-day work week. Some have given positive reports of improved work-life balance and efficiency.