Honestly, I don't see why a company should be required to expend any resources on something they've given up on and which they don't think is going to be profitable any more, as long as they don't hamper any efforts to reuse that equipment. So if they just make available the code and tools necessary for interested third parties to use it (so it doesn't become bricked e-waste), I think that's sufficient.

Perhaps for embedded computer systems like this, there should be an EU requirement for companies sunsetting products to simply make publicly available the tooling necessary to reflash them with new software, along with any other information necessary for hackers to get started.