I've set up a 1password family and set up accounts/vaults on everyone's computers/phones/tablets, yet they still find it too troublesome to use rather than simply writing passwords down in plaintext on their notes apps or just on sticky notes attached to their computers etc...
If anyone has had success encouraging family to use a password manager I would love to hear any tips, as I've sat my family down every holiday season to reset everyone's forgotten passwords and walk them through everything, practice creating/saving/using passwords and within a day it's all forgotten again. Like backups, I feel like no one takes it seriously until something truly horrible happens.