Looks promising for small use-cases, but is it truly feasible?
Current brain stents are formed of titanium or a titanium-nickel alloy, which aren't very electrically conductive (given my understanding). As such, can these conduct the current such a long way to the lower-body, as they show there? What about additional interference along the way? The signal from those 16 end-points is bound to be jumbled around by the time it reaches the receptor near the chest.
Nevertheless, quite interesting! We need some safer alternatives to Neuralink if we want to promote safety in this area.