google+ is something people these days joke about, like that service you're forced to sign up to but nobody uses.
yes, they are integrating features to collect data across their platforms, but essentially google+ as something people come to like facebook is the walking dead.
FB is where you go to have your grandma and aunt write weird messages. G+ is where you go to share photography and travel logs. Sure, people do each of those things on both platforms, but g+ is in no way 'dead' or even close to it just because you don't personally use it.
Facebook and G+, while both being "social networks," function totally differently. Whether google wanted it to be a direct competitor or not, it's just filling a different niche.