It is more of a necessity to have numerous important & need to know things written down logically; mainly in case of an accident or other emergency, also if there were no power for any reason or if my PC were to crash. If my son, who is legally responsible for my health care in a case where I am unable to make decisions & to whom van and property would go.
If my son had to take over and drive or garage my van, then it all is written in book for his easy access to van info and my Legal Advance Directives if I were to be hospitalized for a day, a week or worse, then he'd not have a clue about accessing Workflowy or other apps. I write it in book more for son, than for myself who has it all memorized.
In case of vehicle or other accident, a LEO or EMT would also have easy access to their most needed information on my emergency contacts, insurance, inter alia. They would also know how to disable what needs to be if van must be towed & stored. My Firemen & EMT in family, is who implored me to write those things down. I listened.
Apps are great in most cases and I love and use technology, but it is not useful to me for those above reasons.