What a cluster. 3+ years to prepare.Biden's done IMO. He's making so many unforced errors it's almost criminal.
Buttigieg is going to pick up Biden's steady bleed of support early on. Buttigieg will then crash due to his cross-demographic support issues and Klobachar will become the Great Establishment Hope.
By that time I think it'll be too late for her to have a chance of winning outright; it'll be either a Sanders win or no winner. In the latter scenario I think Bloomberg runs in and steals it at the convention, and the internet explodes with anger (US progressives), laughter (Trump supporters) or bemusement (rest of the world).