any idea why?
I think I know how to set up and run a typical D&D-fantasy style campaign: starter village, local dungeon, more dungeons etc on a wilderness map. PCs get XP and loot from exploring the dungeons; rinse and repeat. With SF I don't really have the same competency; campaigns tend to feel linear, which doesn't generate the same energy. Compared to fantasy sandbox campaigning I think there is a profound lack of material for SF sandboxes, at least material that works for me.