So who drops out after SC?
Biden is expected to win, but I think it'll be closer than polling suggests. Polls skew much older because most are landline voters only.
Steyer is also predicted to well which may cause him to stay in the race until after Super Tuesday. I think Biden is expecting a win in SC to help propel him to perform better on Super Tuesday, but a lot of states CA/TX have already more than half of their votes counted early. Also Biden has not been working those states at all. Bernie has been all over CA/TX since two weeks ago.
I think Pete/Amy will probably hold on to Iowa/NH performances longer than they should, maybe even after Super Tuesday. Pete is still in the realm of consciousness for all Primaries even if he does not look poised to do well on Super Tuesday.
So that leaves Warren who unfortunately with a lot of voters she's been very alienating. I really do like her as a second choice and would make a good running mate to Bernie if she bit the bullet and apologized for her comments. But if Bernie is the nominee I think he'd pick someone that is not from a state so close to VT.
After ST I think Warren and one of Pete or Amy (probably Amy) drops out. Also Steyer probably drops out.
Bloomberg is a weird case, he might drop out and endorse Biden. I also think that polling has been over-reporting his numbers. There's just no way he had 15%~ of voters after coming into the race at the last second. Also his debate performances have been tragic for his campaign.
Or! since basically everyone wants to stop Bernie maybe they'll all stay in and hope for a contested convention and undermine the will of the voters. Bernie will have the most votes and delegates after the primary voting is over. But will he have the outright majority? It would be an absolutely disaster if the DNC chose Biden or whoever. The Bernie voters who are not "vote blue no matter who" would be too much of a loss and whoever the DNC chooses will 100% lose to Trump.