What is the advantage of the Phoenician alphabet over the writing of Egypt

What is the advantage of the Phoenician alphabet over the writing of Egypt or Mesopotamia? What is the disadvantage of the ancient alphabet?

The Phoenician alphabet consisted of 22 characters. It was easy to remember them, this simplified the writing procedure, in contrast to the hieroglyphs of the Egyptians and the inhabitants of Mesopotamia. The symbols of their alphabet constantly had to be checked when writing. Foreigners could easily learn the language and writing of Phenicia, which simplified economic relations.
The Phoenician alphabet also had drawbacks. There were only consonants in it, and vowels were simply omitted when writing. This prevented an accurate understanding of the written texts. Over time, it was improved and taken as a basis in many world sound-letter systems.