There was no warning about /etc/pacman.conf.pacnew in post #1 of Stable update 2023-07-10
And even people with reading abilities seem to have overlooked information posted by @cscs in post #2 about merging /etc/pacman.conf.pacnew.
Many more posts than usual from new users and ‘been a while since…’ users
No surprise considering it has been a while since users on stable branch had to deal with a .pacnew file