I'm not sure that's quite fair though. Harris brought a lot more positivity, had a record on crime, and Clinton had decades of baggage and had been attacked by the Republicans since the 90s.
Harris banged on endlessly about the broad tent, vs Hilary's basket of deplorables. She put a lot more groundwork in too. Also I'm unconvinced that there was another choice when Biden stepped down, so I'm not sure about characterising it as trying the same thing twice.
I'm not sure that's quite fair though. Harris brought a lot more positivity, had a record on crime, and Clinton had decades of baggage and had been attacked by the Republicans since the 90s.