Compare Egyptian and Sumerian writing with Phoenician. Which one was more convenient and why?

Compare Egyptian and Sumerian writing with Phoenician. Which one was more convenient and why? What was the significance of the Phoenicians’ depiction of the alphabetic alphabet?

The Egyptians used hieroglyphs, the Sumerian cuneiform, and the Phoenicians invented the world’s first alphabetic alphabet, which consisted of 22 letters. Its advantage was that it was much easier to learn and learn. However, the Phoenician alphabet had a clear flaw – the lack of vowels. But still, when the Greeks borrowed this alphabet from the Phoenicians, they were able to get rid of this deficiency and added vowels to the alphabet.