I hope it doesn't go away anytime soon. G+ has really become my online home, even more so than a certain forum for Android.
I'm not going to sit here and try to argue that it's perfect or necessarily even good enough for everyone. For me, though, it's pretty close to what I want from a "social network". I put that in quotes because G+ does depart from what many might consider to be a staple of social networking. While Facebook (for me, at least - and I admit I haven't visited since shortly after G+ launched) seemed to be made up of a few close friends, family whose presence on the Internet made me just a bit uncomfortable, hundreds upon hundreds of "friends of friends" or acquaintances I couldn't actually stand, and the mindless unimportant drama that they spewed across the information superhighway at no one in particular. I guess some people are into that, but I just found it to be exhausting.
G+ (again, for me) has been less about "people I know, whether I want to or not" and more "people it would be cool to share a beer with." I've found tons of interesting people to interact with on a daily basis about any topic at all, and interest-based sharing via the Collections feature means I can follow someone's posts about clever photography techniques or classic cars without also having to see their political or religious posts - or the other way around. I've made a lot of great friends on G+, but more importantly I've learned an incredible amount from and had brilliant interactions with other users who are passionate about their interests.
Like I said, the platform isn't perfect, and the way it currently operates probably isn't for everyone - particularly those who are looking for a more traditional social networking experience. It might take a bit of effort to find people and collections to follow and interact with, and limiting your vision to just the people you already know will likely leave your G+ looking like the ghost town the media keeps saying it is.
I've jumped in, participated, and made it my home, and I can assure you that things are much more lively and vibrant than they might seem from the outskirts.