Neuralink

In the book

Threads, a sealed package, and surgery as manufacturing. Interfaces that must be built, sterilized, and implanted — not merely trained.

The implant is not an app. It is a device that has to be made, sealed, and placed. We keep Neuralink in the book because it insists on the same rule as Starship: the hard thing is the object, and the object has to work in the world.