I love Bernie with all my heart. But he is too old. We need a next-generation Bernie Sanders, not quite as publicly grating as AOC, but I'd really love to see her elected in 8 years. Maybe Pete Buttigieg? Who did Bernie groom to succeed him?
He's not, as sad as it is, that's why he'll have an easier time getting elected. I'd want a democratic socialist or social democrat in the White House, but let's not fool ourselves... the overton window isn't there yet.