There's also the low-tech solution of keeping your own database of passwords in a text file, categorized or alphabetized, and backing it up regularly but manually (for example, to a phone or a second harddrive). That's what my wife and I both do. The password document is the weak point in both solutions of course. My personal computer, being Linux-run, is somewhat less vulnerable to attack than a password manager app with its data in the cloud, not least because it's a less desirable target. On the other hand, managing your own passwords manually is a little bit more work than letting a password manager do it; but if your lifestyle doesn't require creating passwords that often it's not a big deal.

And of course there's the fact that the standard computer-generated secure passwords are less secure than passphrases like those created with diceware.