PvM brought everyone together decades ago because hardly anyone knew nothing. Everyone was a noob so PvM was challenging. Now that everyone can kill most of the monsters and mainly solo them, since we got endless hp/sp supplies I don't think that will bring people together anymore. We will never be able to replicate exactly what happened in 2004.
idk man, 2017 feels a lot more like 2004 than 2012 did. Getting parties, massive guild parties, and even the annoying people I encounter while soloing aren't as numerous as the people that seem to have an ounce of respect. Maybe it's all in the attitude!