I’m still waiting for any sort of progress towards the hyperloop. Not to mention "Full" self driving, or Mars colonies. Last time I heard of Neuralink, they butchered hundreds of animals for no apparent progress.
That (and that the cars shipped instead of being vapourware like all the other "green" initiatives from the incumbents) are why people were even inclined to bother listening to any of the other projects he's been involved with, even though the same ideas would normally be dismissed as if the proponent couldn't tell fact from fiction.