"One & Done" Legacy Estate Planning People die; entities & (certain) agreements do not. Why take care of only your affairs, when you can similarly situate your Successors? Exploit & enjoy single-Document dictates that set the stage for inter-generational familial stewardship.
Most family destinies involve each generation acquiring, then exhausting, a single lifetime of resources. Break the cycle of perpetual economic depletion (and your Progeny chronically "starting over") with safeguarded accural & multiplication.
People literally lose the "family farm" & business control from insufficient (or non-existent) preemption. Prevent loss from lethargy with on-board succession triggers facilitating uniterrupted management of assets and business endeavors.