Can't reuse a previous password is a great signal of what your password actually is. There are a lot of sites with dumb rules like can't be more than 8 charact

Can't reuse a previous password is a great signal of what your password actually is. There are a lot of sites with dumb rules like can't be more than 8 characters (old WSDOT toll rule) or can't have symbols... So it doesn't always work.