After the Beosound 3 was introduced, I debated on buying one or not.
I happened to be in a B&O store later, talking to a Danish employee about the Beosound 4 I had just purchased. The Beosound 3 came up, and the employee mentioned the top plate having problems, which I had not been aware of. No attempt to concel that fact at all. He demonstrated a unit that had gone out for a top plate replacement. The owner had changed her mind about accepting it back.
I liked the sound. He assured me that the replacement solved the problem, and after trying a few SD cards of music on it, I bought it.
I would have been as disappointed as you were to find there were design flaws with the original top plate, had I purchased it new. But knowing the problem could be fixed, and in my case was, our BS 3 has been a good companion in the house, garden, boat, and on picnics.
The new Bose radio I tried out recently does not come close to the sound of the BS 3: If one reads the Bose reviews, there are more serious problems and complaints with that model.