I'm on-board with anything to defeat diaper Don. Give me Mitt fuckin' Romney as VP. As long as it guarantees fascism doesn't win, I'm all for any candidate that can get the votes. If that takes a coalition like France just had and some compromise, so be it. I don't think we'll see a traditional R and D party split like in the past. Now it's all against F.
Even though he's old, I think it'd still work. By keeping her as VP there's continuity of Biden's administration and she's ready to take over if he doesn't complete the term. He has broad appeal with Independents which will bolster their chances of winning in November.
I have nothing against Harris, but we already have people whining about the primary that was basically unopposed for Biden. I don't know that the US voting system is organized enough to crank out another primary, but it might be worthwhile.
Biden would still work. At this point it would be incredibly stupid to pick an even older person than Biden. Bernie as VP to literally any younger person would be a huge boon.
Bernie as VP would be a bit of a waste. VPs don't do much other than push for their leader's agenda. A younger Progressive would be great, but at this late in the game could be very risky unless they've already been tested on a national stage.