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Parsing nested parens requires stack, which humans are vary bad at handling. So writing in this style will be harder to read compared to linear style that people are used to. There are topics inherently nonlinear, but they are often linearized or directly drawn in 2d space.

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Also most languages already support nested clause structures without the use of parentheses.

They do, but there's a limit to how much recursive embedding the average reader can cope with, especially if the writer embeds a lot of modifying clauses in the middle of the main clause so the reader is left waiting for information they need to make sense of the sentence as a whole.

Absolutely agree. It's probably the biggest disconnect I feel between how ideas are structured in my head and how to best communicate them in written format.

Parentheticals in English sit in this sort of midpoint between a modifying clause for necessary elaboration and a footnote/end-note for optional detail, and lots of people including me use parentheses where "inlining" the parentheses or moving them to a footnote would be more appropriate. That's in addition to conventional uses of parentheses, like to expand abbreviations.

Is "vary bad" a clever pun, or just an amusing typo?

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