Like some others here, I'm 50+ have 5 snakes (daughter has 1).
Just picked up two unwanted baby BP's last summer, So the possibility exists they will out live me even with a natural life span.
They will go to my daughter if she wants to take them in, or to my vet who also runs a shelter / rehoming place and is a snake owner her self.
Of course that can all change over the years, so I will adjust accordingly if it does.
I do have a will / medical directives ect written up, So my wishes are in writing and 2 people have copies, due to the fact my daughter is still a minor