If we're taking Roshar into the space age like Scadrial, we'll need reverse lashing fabrials in the spaceships . . . really strong ones.
Adhesion is useless in space though, so the best cosmere astronauts would be coinshots and skybreakers.
Assuming the soul is purely spiritual (well duh) then "inhabit" may not be the correct term, since distance and location is supposedly irrelevant in the spiritual realm. Perhaps it just identifies with the largest piece of "me"?