 they should still write a will if they're worried that that big asset will end up being divided among a number of heirs. The other thing is how difficult it is to get through probate. Almost all estates, except through trusts or things like that, need to go through probate. I'm not a lawyer, so this is not legal advice in any way. But estates generally need to go through probate. The thing is, it's much easier and faster when there is a clear will. And that can matter in a lot of cases as well.