This video is really for me because I was wondering just now if I was humming the SOS sound sequence correctly. And no, I wasn't.
Morse code is still around but I'd bet that most people don't even really understand how it works. Yes, it's dots and dashes translated to sound, but that's just the surface of it. Reading and sending Morse code is a skill that combines intense physical movement (of the wrist) with highly specific comprehension of the silence in between sounds. In many ways, as it's described in the video below, Morse code is more about the separation between the dots and dashes than of the dots and dashes themselves.
Very fascinating to learn about.