And if you go for four, you'll risk being shut out of people's listening space. Sounds evoke a visceral feeling. The Italian language, for example, is full of vowels, which means that you speak it at the front of the mouth. When we listen to Italian words, we repeat them in our mind's ears. They make us feel warm, hugged, and innocent.
All language has a subtle music of meaning.
Using words that contain lots of consonants suggests that you really mean business. Consonants are tough. Evoking a very emotional response is better done with vowels. It opens up people's ears and softens their feelings. Dare to be Shakespeare.