Lazy take. The establishment has been eating its young and squashing the progressive elements, and the winner was outspent by a staggering margin. It may not tell you about the future of the party but it tells you the party leadership has ignored a substantial fraction of its base.
My ice-cold boring take that will definitely not go viral is that a primary result with a margin of victory of roughly 1 percent tells you precisely nothing about The Future Of The Party.