After you click the "SUBMIT A PUBLIC COMMENT" button (on the page you linked), you then see a message that says, "Comments are due 12/02/2025 at 11:59 pm EST."
I think a better UI design would be to show that info before you press the button, but my main point is that they are apparently still accepting comments.
Technical correctness and public relations are natural enemies. The original material comes from scientists who know what they are doing, but they aren't allowed to write their own press releases. For scientific papers, the scientists are already encumbered by layers of review that make it difficult to meet deadlines for publishing.
First reply is from the OP, and the visual "thread" (vertical line) on the left side is broken. Click on that reply ("The toothbrush thing has gone viral despite it being total bollocks.").
Now again scroll down through posts by the OP until the "thread" on the left side breaks. Click on that last reply ("Fortinet also declined to comment to me.").
Finally, the target post appears as a reply to that ("Fortigate have issued me a statement.")
Navigational issue. One might ask what is the difference between the follow-ups that show up automatically and the ones that don't show up until you navigate. I don't know.