It did evolve quite a bit. There were machines to automatically encode/decode messages. You could even plug a keyboard to it. Some people (Morse himself) had su

It did evolve quite a bit. There were machines to automatically encode/decode messages. You could even plug a keyboard to it. Some people (Morse himself) had such a device at home. Routing was a thing, but there were some limitations of how many communications could happen at the same time on the same wire (Baud was the one who actually worked on that), making scaling difficult. The important thing to understand is at the end of the century, as bandwidth, infrastructure scaling, reliability were all getting better, the phone happened, as a logical next step. The telegraph never made is as a personal device because the infrastructure and the science of the telegraph reached a point where phones were possible. Morse for original mechanism, Baud for scaling, Bell to use voice instead of beeps.