Of course! Manage households! It allows to to edit households without having to switch to them.
Plus the editing CAS allows to easily change both outfits and hairstyles. The Sims 3 was the worst in setting the hairstyle per outfit because you had to change outfit in live mode then change appearance then change outfit in live mode and then change outfit... The styling station helped, but it was so big. The Sims 2 had the ability to set the hairstyle per outfit easily with change appearance interaction.
Plus there are cheats that allows you to make your own NPC sims. Your own pizza delivery, your own professors, your own maids... I just wish it worked for all NPC sims (bartenders, gym trainers, librarians...)
