I feel like you might also be biased (in the inevitable way that you see what's around you as "normal") about what the correct usage of the term is. Perhaps SJW strictly means those more extreme examples in whatever experience you have, but I don't necessarily think that means it's the widespread meaning.
I'm not speaking from a little bubble of nothing but FFXIV-ness. I see the term used in discussions on the comments of news sites or other communities. It's not a backwards ten-years-ago thing for people to understand "SJW" as a petty insult and not a serious issue. It continues to get used loosely, and holds no value for describing specific degrees of activism unless you're certain your audience have the same understanding.
Prior to the rise of it as an insult, I understood the term "social justice" as a positive one - and this seems to be supported by the
Wikipedia article on that term. It also defines
social justice warrior primarily in terms of it being used as an insult - but also that it only began to be used that way around 2011, and was previously considered a "neutral or complimentary phrase".
So no, we're not stuck in 2009 if we think it's a catch-all insult for views that the writer doesn't like.