Lintronic are/were an excellent company, but technological times change – and when manufacturers build in solutions, or there’s no need for what you provide as a company, the inevitable happens.
I saw that they introduced a Bluetooth add-on module so that you could control IR devices with the BT Beoremotes. Personally I’d like to see this work in the other direction, so that the newer B&O TVs could be controlled with Beo4. I do have an old RE-BL (PS3 IR to BT controller – see here) that is similar in concept – just needs a bit of modification …