Secondly, there are cases like GDM, where a single unsupported package have rather "long reaching" consequences. In the concrete example, GNOME (via gnome-core) strictly depends on gdm3, meaning that if gdm3 goes, (more or less) all of gnome goes with it[2]. That in turn meansthat task-gnome-desktop cannot be installed on kFreeBSD (I presume thiswill at least affect d-i).
gdm3 could be replaced by lightdm in the gnome-core package or not?