In my case I've never seen existence as being something desirable in the first place, so I don't even know what having a spirit would be like, just thinking of all the endless harm and suffering that exists here makes me wish to leave, just being conscious and aware, dreading what lies ahead makes me wish to sleep eternally.
But I think if someone sees existence as being something hopeful for them then that can easily be taken away as there is unlimited potential for existing to get even more unbearable after all, there's too much senseless cruelty in existence.