Honestly neuralink is a bigger joke than his other projects. Maybe it will go somewhere but its highly improbable, we simply don't understand the brain well enough to make an input/output device meaningful yet
Wouldn't trying to interface with the brain be a good way to understand more about it?
It does sound unlikely that neuralink actually accomplishes anything impressive, but I don't think it's a joke to try and maybe it will be a step towards something that does succeed.
That's why I said maybe it will go somewhere. Its super unlikely though, because I don't think they're doing any of the actual basic research. They're relying on the results out of academia and then just tinkering with that info. It's definitely possible for them to stumble onto something interesting
The completionist in me notices you didn't mention NeuroLink - his wiring of brains to computers. It's not often in the news.