I believe that Biden was the right man at the right time for our country, and history will hold this term in higher regard than those of us living through it.
I also agree 100% that the time for healing, slow/steady and simple decency will have passed - we need someone to inspire, not merely make government function (as best as it can with the GOP throwing sand into the gears at every opportunity).
Bernie and Elizabeth have seen their opportunities come and go (unfairly, IMHO) - who's left? At this stage, and throwing a dart at the wall, Gretchen Whitmer floats to the top of my mind - although I've not seen her on the national stage yet. Who gets your write-in vote?