[klintcho]

I was about to say that the Link (Neuralink) is already bidirectional, so they should already be able to spike each electron as well as read from it. But I had troubles finding any sources supporting this, so I'm not so sure anymore. I know that Elon talked about this in the early presentations though.

[natosaichek]

The implant definitely can write, but it's more power intensive than reading, and lower priority.