sure, but we dont really have data that proves bernie would have won, etc. it's plenty possible that Biden's name recognition would have carried regardless. after nevada, the media was operating under the assumption sanders was going to win, he was called the frontrunner, etc. with the exception of who was it, chris matthews, who kept having meltdowns, i didnt really see anything nasty (though i dont have cable, so i'm only basing it on what i see pop up on social media or w/e).
youth turnout wasnt anything special... how can you sell "energizing the base" if the target demographic of young voters didnt come out in droves? i simply dont think leftists represent as big a block of democratic voters as they need to to succeed nationally at this point.