Re:Punctuation Matters: How to use the en dash, em dash and ...
by IncRnd on Sunday March 12, 2023 @02:53PM
(#35124486)
What you reference is that commas are used to set off non-restrictive clauses, where the meaning of the sentence is clear without the additional clause. Though, the non-restrictive clause provides additional description of a word in the main sentence.
Such as:
Sometimes writing for money, rather than for art or pleasure, is really quite enjoyable.
Other than that, many people have come up with many writing styles. We mostly seem to be able to understand each other, so we are "all good".
In other words a reader should be able to skip reading the contents of parenthesis with negligible impact on the context or meaning of the sentence. They should be able to skip reading the contents of em-dash-seperated text without changing the meaning of the sentence. And text between commas should be considered integral to the sentence, while secondary to the primary gist.