According to this thread, Hillary was supposed to be done because of evidence of corruption. The question of whether she would face any serious competition in the primaries didn't even enter into it. Now, that question has come to dominate the conversation. So much so that in forming your conclusion to the thread so far, you don't even bother to review the OP at all.
To me, what's fascinating about all of this is the lack of discussion by progressives, about what the rise of Bernie Sanders says about the Democratic Party. There's plenty of narrow partisan bickering between the Shillaries and the Bernie Bros, but it seems the closest anyone has gotten to the broader question is Skeptic Ginger dismissing the anti-Hillary faction of her party as dupes of the GOP.
While Skeptic Ginger's analysis is probably reassuring to an Establishment worldview, it hardly seems sufficient to explain what happened here. The number of candidates in the Republican primaries is widely and rightly seen as the sign of a party in turmoil, and a voter base that is discontent and ill-led. Only a few months ago, members here were pointing and laughing at the "clown car" that is the Republican field--and that was before Trump started to become a thing. I recall one of the mods (Cleon? jsfisher?--it doesn't matter) praising the Democrats for their unity in supporting a single candidate, and avoiding all the messy bickering in the Primaries that was sure to dog the Republicans. Well, they were right about the Republican primaries being a mess. I wonder if they'd like to revisit their views on the Democrats, in light of recent events.
Wasn't Bernie's candidacy supposed to be an "awareness raising" thing? Wasn't he supposedly just in the ring to move the conversation a little away from Hillary's standard centrist establishment line, and towards the more progressive parts of the party's agenda? Well, that hasn't worked out at all. Instead of embracing Bernie's talking points, and his voters, Hillary seems to have taken his candidacy seriously, as something to be opposed, rebutted. Hillary seems to have assumed that there were Democrats out there who would vote for Bernie instead of her. The surprise turned to be that her assumption was correct. I think everybody, including the candidates themselves, was a little surprised by that. So now I'm wondering, why do those voters exist, and why was the party surprised to discover them?
ETA: No offense to Trakar, who has been very articulate from very early on about why he supports Sanders, and about why he thought from the beginning that Sanders's candidacy was more than just a conversation piece. I'm wondering more about the larger picture, about what the existence of voters like Trakar says about the Democratic Party more broadly.