The crazy thing is, they had a nascent social network going with Google Reader, populated by people who were engaged and interested in the content. And they threw it all away to chase a Facebook clone, which was doomed anyway.
They could've had basically Reddit if they added a way to have comments in Google reader. Then again, they would've never invested in moderation, so it probably would've turned into a shitheap.
Google+ could have been successful to a degree, in terms of features it was an improvement over Facebook in several ways. The problem was the invite only launch.
The invite period worked for Gmail because it was still interoperable with other email services, and made getting a Gmail address seem exclusive and desirable. Making a walled garden social network invite only, however, just lead to it being empty. Most who did sign up looked around for a few minutes then went back to Facebook.
They only thought they moved away from RSS feeds. A whole bunch of the internet is built on Wordpress which publishes an RSS feed by default at website.url/rss or website.url/feed. Which means a shitload of sites are running feeds even if they don't advertise it (or realize it).
Podcasts by definition are all RSS based, but Spotify, Amazon and other VC based distributors are trying to change that with subscription and exclusive content.
Even those are still announced via RSS I believe though.
Honestly, yeah I think that's how it worked for me too. Reddit wasn't exactly the same, but depending on how you curated your subreddits, it could fill a similar role.