To be honest, I think I got lucky that I first became a frequent web user pre-Facebook, as I can see that I might have ended up a similar way. A decent sized chunk of my early web usage had some form of social element, but chat rooms, web forums and news aggregators don't have the same stigma as social media, perhaps because the discussions revolve around subjects someone is interested in, rather than discussions surrounding the people using that service. HN is a continuation of that early online behaviour, for me at least. However, if I'd grown up in the post-Facebook era, would my Internet activity gravitate towards social media for online discussions? I don't know for sure, but it seems plausible.

I'd say the larger question is, how do we let people know there's online communities outside Facebook that they might enjoy just as much or even more? Perhaps Reddit is a useful gateway out of the social media bubble, there's a huge range of communities on Reddit, it'd be hard not to find something someone was interested in.