I could care less. I don't really use facebook. I'd prefer to use G+, but the fact is that it's just not as ubiquitous as facebook, and might not ever get there. I do like the fact that Google does not harvest your personal information to generate targeted ads (with better click-through rates). As this is not cause for concern for the average user, there's no panic-stricken emergency migration to G+.
That's the present, let's look at the past for a bit. Myspace trumped xanga (back in the day), which later got given the slip by facebook. Social networking hosts seem to trend from one client to the next. But I doubt that people will move away from the little f until something really amazing comes along. Don't get me wrong, G+ is pretty good, but it might be too little too late to take over social networking.
Let me cite the following example: Often when I hear people talking about portable music players, I hear iPods and MP3 players. iPods have taken over that industry, and no one has taken them down. Who doesn't think of facebook first when they hear 'social networking'? The only thing that phased out the ipod was the integration of the music player into the smartphone. Similarly speaking, it would be easiest to phase out facebook with a social networking that was built in to an OS, eliminating the need for a third party. Facebook however, works on just about every platform imaginable, and there's not really a need for OS developers to try and replace it. Conversely, they're more likely to integrate it more deeply than before, which scares me.
Anyway, I guess the real point I'm trying to make is that if you don't like it, then don't use it. You have the power to do so, believe it or not.
/rant