Bip39. It wasn’t best from a person knowledge perspective to convey the least. People today would typically instances ignore to backup their wallet file or they did back it up but then the backup would wander away because it was saved on electronic products which would fail quicker or later. https://shanenetkx.blgwiki.com/1105309/the_anatomy_of_a_bip39_phrase_entropy_terms_and_security