Performance issues (I'd say most are imagined, but there is definitely an increase in latency) and higher cost of deployment with SSL (essentially more expensiv

Performance issues (I'd say most are imagined, but there is definitely an increase in latency) and higher cost of deployment with SSL (essentially more expensive CDNs). Some sites that rely on 3rd party services might struggle to deploy full SSL if not all services support it. In my experience, most people are recommending partial SSL because they're not aware of the security issues. For example, many developers "know" that you're supposed to use SSL only to protect login credentials.