A will can tell your family who gets your property, but it does not automatically solve every problem waiting for them after your death. Some assets follow beneficiary forms, some accounts follow ownership rules, and some pieces of your life exist almost entirely behind passwords and screens.
That creates an odd estate-planning problem: a perfectly respectable will can sit in a folder while your heirs hunt for the information they actually need. The National Institute on Aging recommends keeping important financial, legal, insurance, and account information organized in one place for exactly this reason.