I know it doesn't answer the question, but it does hit at the heart of the issue. I use Enpass - the only password manager I could find that doesn't store your info for you--because I was also concerned about breakins and single points of failure. I am able to keep my entire password collection on my local hard drive and in whatever online storage tools I'm using currently (onedrive, google drive, etc). This seems to fit well while removing the issue with online password managers.