There was a little problem with
error: failed to commit transaction (conflicting files)
lightdm-gtk-greeter-settings: /usr/lib/python3.14/site-packages/lightdm_gtk_greeter_settings/__pycache__/installation_config.cpython-314.pyc exists in filesystem
I think this is some packaging mistake upstream. But since this only affects the pycache, the folder /usr/lib/python3.14/site-packages/lightdm_gtk_greeter_settings/__pycache__/ can be deleted (i backed it up) before the update. Alternately one has to update with
sudo pacman -Syu --overwrite "*"
The Microsoft spyware dependency for Calibre has been fixed as optional btw.