Thank you Patricia for bringing this eventual reality to our attention on the Forum. We should all make provisions to take care of all of the hours of work we invest in our ancestor's lives.
When doing the advance directive, we can designate a family member but they will need to join WikiTree if not already a member. One thought I have had is to designate one family member for my maternal side and another family member for my paternal side. My fall-back will be to designate the WikiTree team.
I hope this post inspires others to take steps to care for their ancestor profiles.