[Question] What is the best source to explain short AI timelines to a skeptical person?

This is for a person with no ML background. He is 55 years old, he liked the sequences and I recently managed to convince him that AI risk is serious by recommending a bunch of Lesswrong posts on it, but he still thinks it’s astronomically unlikely that AGI is <80 years away.

There are a lot of other people like this, so I think it’s valuable to know what the best explainer is, more than just in my case.