We know because the slim didn't support Linux. Sony is highly proprietary and most of the times just for the sake of it, supporting Linux was Kutaragi idea, we wouldn't get the PS2 Linux kit if Kutaragi was ousted then. Remember Sony rejected Microsoft Win CE OS on their Playstation platform which paved the way for Xbox. OtherOS was very much un-Sony from the beginning and like Kutaragi it is now axed.