The Length of a Password is More Important than the Complexity

As you can see below add 4 characters to a password with no complexity rules makes the password much more secure than requiring adding special characters like uppercase, lowercase, digits and symbols

Passwords are (one of) the biggest pain(s) in today’s IT security. They are a factor of life, and the modern lifestyle requires us to have a great many of them. So we need to make sure we’re aware of what is a strong and a secure password.
NIST? NIST is a non-regulatory federal agency whose purpose is to promote U.S.