What's frustrating is that Reader would have been complementary to Google+. It could have served as a huge funnel by which users could discover content to share

What's frustrating is that Reader would have been complementary to Google+. It could have served as a huge funnel by which users could discover content to share on Google+. That's how I used to use Reader (though at the time I found content that I shared other places, such as Facebook, Digg, or Reddit).