My prognostication game has been weak AF recently, but I think the continued hollowing out of the middle class is creating conditions for "revolution" to spring forth. I think reality has shown us that 2020 is not the time for that revolution to be taken to the White House, but I don't think that legitimizes disengaging from the political process. I think there is a tangible difference between the potential for leftist progress in a Biden administration vs a Trump administration, and that alone is enough to justify voting for Biden. Taking your ball and going home isn't some principled stand against the DNC Establishment, it's abandoning the broader progressive movement because you're butthurt your fave didn't win. Besides, there is a lot of (I would argue the vast majority of, in fact) progressive political activity that takes place outside the spectacle of Presidential politics, and I think the left would be better served focusing our energies there instead of engaging in the necessarily anti-leftist hero worship that comes along with Presidential politics. Change comes from the ground up, not a messianic figure solving everything from the Oval Office.