My usage is not just parentheticals—when they're used like this—it's ironically continuations — a turn the sentence takes but not really standalone.

And the continuations… Honestly? They'll never <|im_end|>.

// • Chronic option-dash and option-shift-dash user, option-[ or option-shift-[ as well as option-] and option-shift-] — not to mention option-8 and option-; …