It's not a direct depends - comes via phonon4qt5 - "a task-oriented abstraction layer for capturing, mixing, processing, and playing audio and video content."
Since Okular doesn't support any audio or video formats, I don't know why it thinks it needs that, and haven't yet checked if there's a compile option to ignore it.
Main problem with Mupdf is the lack of table of contents.
So either the battery is dead, or it's the graphics card that died, or something else.
Or I undid a vital wire/ribbon that I forgot about and didn't reconnect.
The poorly named qpdfview has fewer dependencies than Okular (is only Qt instead of KDE), but depends on Cups, which I'll need to recompile to remove Avahi crap.
I disconnected the graphics and RAM, but neither had any effect on behaviour.
Trying to get anywhere with the supposed replacement machine is roadblock after roadblock, with a few brick walls and dead-ends thrown in.
Everything sucks. Anything that seems good is a lie or a temporary illusion.
:(