Take the word 'killer' superficially. Its just a marketing jargon. In fact is more a compliment to Brompton that everyone is trying to 'dethrone' the 'king'. Just as everyone is looking to have a iphone 'killer' or Intel 'killer'. On the other hand a product need to 'progress' to stay relevant be it a wheel or gear train. This is an area Brompton is behind and we look forward to some innovations from them.