You'll notice that the Noldor have a different opinion on the usefulness of literacy compared to the Sindar! Rúmil's alphabet was invented separately and independently of Daeron's alphabet mentioned in a previous episode, though I suppose it's possible they discussed the issue on the Great Journey (if Daeron is old enough, and wasn't born in Doriath) and influenced each other.
Part 117: Why?
Next time: Part 118: To die, to sleep
Chibis by tektek.org