Admittedly too much time on my hands today between forays to comply with the shoveling ordinance, but here goes: Is anybody else annoyed by the Mayor’s consistent use of P.S., P.P.S., P.P.P.S., P.P.P.PS., and yes (today), even P.P.P.P.P.S. in her weekly updates? I was always taught that a post-scriptum is something you think of after the main text has already been written. In the old days, or even the days of typewritten letters, you would have already written your closing lines, signed the letter, and then you thought of something you had meant to say or that might enhance your main point or that might offer a tangential thought. You would employ a P.S. to create that addendum.
In contrast, with electronic writing such as emails and blog posts, you can always go back and add the extra text in the main body. So in the update context, they feel to me either like forms of click bait or just an indication of poor planning for the main text.