Last election, Bernie Sanders was winning, which the DNC didn’t like, so as soon as Biden won a state they pressured all the othe candidates to drop out and endorse him. This year, there simply isn’t a real opponent.
The sad thing is there really isn’t. America lives under a gerontocracy, and the Democratics are especially bad a elevating new, young voices in their party. Dianne Feinstein was 90 years old and had dementia and the Democrats didn’t force her to resign. She served as a senator while experiencing cognitive decline for at least the last two of her life before dying in office.
Even the, “new,” faces that are coming up are old. Every now and then you get a Pete Buttigieg, but by and large, most of the potential presidential candidates will be pushing retirement age by the next election. Gavin Newsom will be 60, Kamala Harris will be 63, Amy Klobuchar will be 67…they may not be quite as old as Biden, but I certainly wouldn’t call them, “fresh.”