It Should be Possible to Live on Sixam
I really think it's time for an update so that sims can live on Sixam. Now Sixam is just boring, the only things you can do is to look at the (very beautiful) place or just pick up collectibles. If you're in the science career you can also go on some event there, but it happens very rarely (at least for me), and this event is just like any other bar night event but without toilets.
Since it's possible to make aliens in CAS it makes no sense to me that we can't have even our aliens living on Sixam. (I don't think it's the same that spellcasters can't live in The Realm, because The Realm is more of a headquarters for spellcasters, while Sixam is basically just an empty place.)
By the way, if Sixam was inhabitable it shouldn't be possible to get abducted by aliens there, because that wouldn't make sense.
Added a picture for inspiration. ^^ I don’t own the picture, it’s from a trailer.