You know what's great?

By amassing delegates and popular support, he gains leverage with the DNC to modify the party platform that the party runs on in November. That leverage is important: without it and a strong endorsement with vigorous campaigning in the fall, she will not carry progressives to the degree she wants.

Hopefully the party doesn't tell Bernie to stuff it. That would be arrogant and unwise, especially given how they've treated him with the voters disagreeing.

She is not beholden to what she says! So, in that sense, the poster is actually correct, though it certainly *does sound rather presumptuous. In a normal functioning system, you are correct, though...Bernie should be able to hold sway at convention to drive the platform further to the left. (And he may, if she is the actual nominee).

to work with, to an extent.

That battle will never be over.

Well I suppose we can't make Bernie keep running. But, he sure has shown he is willing to listen to reason.