Elon musk( https://x.com/elonmusk/status/1826409318578565326):

Update about the second Neuralink device in a human.

If all goes well, there will be hundreds of people with Neuralinks within a few years, maybe tens of thousands within 5 years, millions within 10 years, …

Let's see if that first prediction comes through. Hundreds I figure has to be at least 200, and a few years should be more than two and less than 5 (since Elon gives a separate prediction for 5 years), hence there 3 year prediction in the title