I just prefer to use my mind, I have different passwords with different levels of security, some for daily things, some for important private stuff, I don't need to remember the password, just the method I used to create it, with a mix of mathematics and letters and special characters, just using my family, locations, special things in my life... even my wife can't remember my passwords, and I'm always showing her.
Anyway, I don't trust cloud computing, and servers can fail, even home servers can suffer, handbooks are made of paper, and my own computer is not secure enough, hardware fails, Hard disk damage.