Have been happily running OMV 7 using a cli build.
The build was constructed using the Radxa build tool where the relevant switches were set to exclude the inclusion of plasma etc.
I haven’t executed an OS update in a few months. Just did - but saw there were 100 something packages related to KDE, GUI, Desktop, Video, etc which could all blow up my OMV installation. Is there some way to disable these updates or do I just need to avoid an apt-update/upgrade? Previous updates have not forced these components on me.