They don't connect to the company server. They just shut down and display a message to the operator. It's up to the operator to receive an unlock code from the

They don't connect to the company server. They just shut down and display a message to the operator. It's up to the operator to receive an unlock code from the manufacturer. So, there's no server involved. It's all human-to-human interaction. But again, in 15 years all these codes will be lost by the manufacturer itself, so your main point is valid.