My guess is that a statistical analysis of other things such as access patterns, timestamps, content you engage with, etc, could de-anonymize you regardless of the phrasing you use, so LLMs won't save you.
True, but you could also use llms to autonomously engage with content you're not interested in, batch replies for times you're not around, inject coherent, consistent, plausible, but false details into your messages, or modify/flag details you didn't mean to disclose.
as the_af says, stylometry is only one technique in a bag of techniques used for de-anonymization. a big one to be sure, but nowhere near the only one.
As you say, the_af mentions this an hour before your reply. I'm curious what is the point of your posting a "me too" comment here? Was it to teach naive readers the word stylometry?