I'm not too familiar with the details of Semitic languages, but as far as I can tell it seems the tri-consonantal roots of words are relatively important. If the consonants change over time, did they change together so that the roots are preserved in structure?
I ask this as a Chinese speaker, where the initial constantsconsonants are all over the place throughout linguistic history. If what I'm suggesting is true, could the abjad writing systems of Semitic languages (or even alphabets of European languages) slow the random evolution of phonology?
I might be way off on this, so please enlighten me. Thanks!