The Dems no longer have any winner take all states.
Correct, and since votes are apportioned it’s meaningless to talk about “winning a state”. What is significant is that even if they split the vote, BO will continue to be a threat and pull ahead. On the other hand, there is a psychological advantage in “winning” and certainly a demoralization element to those who will be asked to keep writing the checks.
Polls and superdelegates aside - the bottom line is this is shaping up to be a contest between the politics of the past and a vision of the future.