Thats the key here, Kamala can win a general. She doesn't have the baggage that is fatal in the general like Warren ("Copla" baggage only hurts in a primary). If we get someone like Kamala to adopt Warrens platform we are in a great situation.
General election candidates still have an effect on downballot elections, though. Anyone working in the justice system during the past 25 years of the "tough on crime" era will need to address and account for the effects of their participation. Klobuchar, Harris, Booker and Buttigieg to some degree as mayors. Preferably before the DNC.