There will always be new, perhaps younger, users who come through who don't know what it was like before. And of course, there will always be more veteran users who perhaps don't care. I care that reddit is going to shit, but I'm still on it (less than pre-APIgate though). On the other hand, my brother who's been on reddit almost as long as me, doesn't care. As long as gets his memes or whatever else he uses reddit for, he'll be there. He barely knew about that protests last summer.

It seems that the only way a social media actually collapses is when the company itself pulls the plug. Twitter has been circling the drain since Elon bought it, but it's still one of the main nodes of information from companies, governments, journalists, and just regular people. It's still used by millions of people daily, even if it's also used by millions of bots, too. Google+ was in a sad state for a bit, but there were still users. It only died when Google finally shut it down. I think Vine was in a similar situation back in the day.