Not sour at all. Please stop projecting your image of Sanders supporters on me. Enjoy your win in whatever way you want. You guys have earned it; Biden did come back from the dead and timed the endorsements perfectly.
It is striking to me that the assumption is that Sanders people are awful human beings who won't support the ticket, but the reaction tonight has been a full scale "See? Go f-ck yourselves, Sanders! Nya nya!" from Centrists. So... who are the people who are actually demonstrating selfishness in the event?
Let's see if the Biden fans can practice what they preach and not be d-cks about it. It will be instructive. If they can, that's very good moving forward. If they can't, well, they'll get the nominee they want but also show that in the end it wasn't actually the Sanders folks who were the jerks. Pretty simple and entirely within your power.