Reddit, like Twitter, isn't going anywhere. It's just a worse value for the end user, and in Reddit's case the business is potentially better off for it, users be damned.
I disagree. Twitter is already dying, albeit slowly. Reddit will suffer the same fate. The entire reason Reddit grew the way it did was because it had content that other sites didn't have and the reason it had that content was because of the niche subreddits modded by people who were extremely passionate about niche stuff. Reddit won't grow anymore because the content being fed to it now is just content stolen from other sites and it's not any easier to access or better for being on Reddit. It's a worse value for the end user because the value was in the people that have now all left.