Fortunately you only need to find a one of the many possible devices to sue. Just winning a couple of these will send a message. The goal isn't the $$$ directly (the lawyers are the only ones who win) it is to send a message that you are forever responsible for your vulnerable devices and so you better make them secure.
The hard part is if any of the devices are from someplace that doesn't have a US (or whatever country they are in) presence. That country my ignore the lawsuit.
The hard part is if any of the devices are from someplace that doesn't have a US (or whatever country they are in) presence. That country my ignore the lawsuit.