Sorry this is a little long, but I wanted to add a couple thoughts.
For me, I have three levels: [1] unimportant passwords are stored on the browser and on a backup file (i.e. if someone used the password, they would not be able to cause much harm), [2] semi-important passwords are stored on paper and backup files. but never stored on a browser (i.e. sites where someone could hack in and cause trouble), and [3] passwords of high security importance are stored on paper.
The high security passwords are mostly those of customers' (city agencies, county agencies, state agencies, government agencies ranging from confidential to maximum security, various banks that I've done security work for, etc.). When a customer's password is no longer needed, I burn the paper: zero risk of a customer's password being found if someone were able to hack my security computer (if a device is electronic, it can be hacked).
After many years of doing security work (systems as well as computers) I've seen a lot of weaknesses that crooks take advantage of, weaknesses that honest people would never imagine to exist. My personal rules for myself are [1] never ever use the cloud for anything, [2] never have sensitive data on a computer that is connected to a network (that includes cell phones), and [3] if the data is super-duper important, then never put it on any electrical device.
But all of this is pointing to one of the reasons of why I use Solus online: hacking continues to worsen, and it has already reached the point that having one's computer getting hacked is just a matter of time (tons of people have already been hacked and don't know it). If/when my pc gets hacked, I can reinstall Solus and my configs within a couple hours, and have no stress of worrying about stolen confidential information.
Humorously, my main passwords use a specific pattern that I can easily type, but I couldn't say nor write the passwords without first typing them. I've been on keyboards way too long I think... <grin>