Hardware replacement is the fallback for non-updateable devices: such a device has replaceable hardware, meaning defined procedures exist to replace the hardware or components, particularly when a critical vulnerability is found, and a replacement plan is communicated to the consumer. Status in Table B.1: R C (3) (recommendation, a should provision; conditional on the device's software components cannot be updated).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.