This article is math true, however, hackers no longer use brute force attacks and the most popular method is to attack a weak website like for example a not very popular blog, then if they succesfully broke it they have a password and a email account from you and if they are very lucky you have the same password for the email account, so, they got you.
Therefore, nowadays it is safer to have different passwords for every site.
Personally, I love to use lastpasss for my personal use and keepass for the office to store and manage passwords. Obviously, the weakest link of the chain is my password for the password manager application.
Any of you use a different password manager?
You can add a variety of two factor authentication options to lastpass (phys OTP, yubikey).
You can also allow/disallow "offline" access to your lastpass account when using these two factor options (force second factor at all times or allow single factor if offline).
