Joe Biden “should not concede under any circumstances.†<- This is the Democrat version of 'peaceful transition'. While they are wailing and crying about Trump, they are openly committing themselves to disrupting the election results if they do not win. That is a hypocritical as it gets.
When Hillary said that, she was talking more about herself than she was Joe Biden. She was essentially declaring that she herself regrets conceding to Trump after the election.