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Synth software service requires a physical connection. The robot is present and involved in the decision, and no broadcast receiver remains available for remote commands. A technician connects through the sealed upper-back service socket. This takes more work than an over-the-air update, but it removes the route that allowed one malicious instruction to reach servos around the world.
Local operation still requires reliable hardware, power and maintenance. Removing wireless control doesn't make every component immune to failure. It limits how changes reach the individual machine and makes a service visit specific to that synth.
A technician can explain the proposed work and record what changed. The synth can ask questions or decline the service. The socket is a physical connection, not a replacement antenna. Restoring global communication through Orbinet would not automatically reconnect converted synths to remote control because the required broadcast hardware is no longer there.
