Bip38 Vs Bip39. From this stage forward the seed may very well be published on paper or spoken above phone and this opened up new, Actual physical ways of backing up the seed (multiple paper copies in several locations, resilient copies on metal plates with excess safety from hearth/flood etc.). https://sergiocmxhr.wikinarration.com/6467903/the_anatomy_of_the_bip39_phrase_entropy_terms_and_safety