Why is Warren still in?

It looks likely Liz will even lose her home State of Massachusetts on Tuesday, and she certainly won't place well in all future races. Since she has no path whatsoever to the nomination why is she staying in the race? Krystal nails it that her goal is likely to force a contested convention by watering down Bernie's delegate victories. Her campaign admits as much. But why?

Because there would be jockeying to form coalitions to get the majority of delegates. Would she help Bernie and Biden? Given Liz's more centrist shifts it seems she's more leaning toward Biden. It seems she likes having the power to be relevant. What did she do in 2016? Pretty much the same thing. Instead of endorsing Bernie she vied to position herself as relevant. We cannot read her mind but we can read the tea leaves of all of her actions and they point in this direction.