I very strongly disagree with your statement: “The problem is that to have one letter represent every possible sound would probably require more letters than can be easily remembered.” Kenyon and Knott used only 33 symbols for their phonemic alphabet for American English referenced by John Lawler
here. The actual problem is that there are incalculably many completely valid and distinct ways to pronounce a word depending on region, accent, education, speaker, situation, &c&c&c, yet just few standardized ways of writing it. Writing is frozen. —
tchrist ♦ 5 hours ago