== Another reason for the popularity of morse code among radio amateurs == 

 Something that I think is missing on this page is one of the reasons why using morse stayed very popular for such a long time among radio amateurs. Apart from matters like it's robustness to interference, an important point is that you need much smaller RF power to be able to communicate over long distances compared to any voice transmitting technology. This means a simpler and cheaper transmitter could be used. A transmitter for morse is also simpler to build because you don't need a modulator. In essence, it's just turning on and of of a transmitter.