2 points
It’s so liberating to use short sentences. You’re writing a paragraph on a page. The reader is going to know that they all relate closely to each other. Make every clause a sentence! It’s fine!
3 points
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It is good, but i also like some commas too.
For less important propositions, or to have some propositions closer together. Just like paragraphs link some sentences together when having the same point.
I think having that registery and doing it right is really what’s important. Short sentences is great advice because it breaks the habit of long ones, which we get from speaking.