There are clearly some being replaced, but I'm just going to sit on my hands for a while. This is what mine looks like now.
# apt-mark hold plasma-widgets-addons
plasma-widgets-addons set on hold.
# apt update && apt dist-upgrade
The following packages will be REMOVED:
kactivities kde-plasma-desktop kde-standard libkf5screen6 libpowerdevilcore2 plasma-desktop plasma-systray-legacy powerdevil
The following NEW packages will be installed:
libkf5screen-bin libkf5screen7 libkscreenlocker5
The following packages have been kept back:
plasma-framework
The following packages will be upgraded:
grep khotkeys khotkeys-data kio-extras kio-extras-data kscreen libkworkspace5-5 libplasma-geolocation-interface5 libtaskmanager5 libweather-ion7 plasma-workspace
11 upgraded, 3 newly installed, 8 to remove and 1 not upgraded.
Abort.