(Early on, one requirement I gave it was not to use em-dashes for anything player-facing. It's kind of amusing (and a bit sad) at how often I see in its session self-talk something like "No em-dashes!" alongside much more important comments. It's really taken that constraint to heart! :) (Alas, I liked to use em-dashes myself, too; I'm resisting giving up semi-colons and parentheses, though!)

Fortunately, I personally enjoy writing. Currently, I wouldn't be able to claim that Claude didn't contribute to the writing, but nothing in Vestiges should sound like genAI. (Which is actually a little funny to me since one of the characters is an AI. But the genAI writing style grates on many, including myself, and I'd imagine that 20+ years into the future, such issues will have been solved.)