If I sell you a car that runs on special hydrogen fuel, and I sell the hydrogen fuel, and then I stop selling it, you should be allowed to find a new source of hydrogen fuel.

Exactly. You sold me a car that runs on fuel you produced. You decide you’re no longer going to run the machines that produce the fuel. Do I get a copy of your machines so I can produce the fuel myself? No, those are your machines. I didn’t buy the machines that produce fuel, I bought a car. A car I still have.