Quantitatively, how much more secure would using two factor authentication be over what the author is doing?<p>Edit: Assuming that someone only crafts 9-plus-character passwords that don&#x27;t show up in dictionary attacks and aren&#x27;t reused across sites, is 2FA going to secure that person much more?  I&#x27;m not challenging 2FA.  Actually, I&#x27;m just trying to motivate myself to use it.