The main thing is that the soft c sound is voiceless, whereas s is often voiced (same sound as z). I asked a linguist friend about it, and you could probably get away with changing the spelling of words that use s for a voiced sound to instead use the letter z.
Oh then I don’t buy the argument of the video then. Not that there aren’t real patterns here, but they vary by dialect and if consistent can be fixed by swapping to z as your friend says. C still seems redundant to me.
The main thing is that the soft c sound is voiceless, whereas s is often voiced (same sound as z). I asked a linguist friend about it, and you could probably get away with changing the spelling of words that use s for a voiced sound to instead use the letter z.
Oh then I don’t buy the argument of the video then. Not that there aren’t real patterns here, but they vary by dialect and if consistent can be fixed by swapping to z as your friend says. C still seems redundant to me.