What had been a separation is now officially a divorce: DCB wants no more to do with EELV. In some ways, this is an odd dénouement to a long saga, since Cohn-Bendit had long argued that EELV should not run a presidential candidate of its own but instead try to exert maximum leverage on the Socialists. Others countered that without a candidate of its own, the party had no leverage: that was precisely the issue.
Now, both sides have their wish: the EELV leadership has become a (minor) appendage of the PS, bound by the doctrine of governmental solidarity to stifle the opinions of its own ministers when they differ with those of the government, and linked to policy choices unpopular with EELV voters. So EELV is both decapitated, as DCB wished, and impotent, which he claimed would not be the consequence of decapitation. His departure is therefore the logical culmination of his and his former party's contradictions.
But Dany's position in the French political spectrum was unique. He could not be intimidated by left-wing romanticism of the sort that Mélenchon successfully peddled for a while. He had grown up in the struggle against outmoded ideas of the universal working class, the vanguard party, and the "relative autonomy" of politics and economics. Yet he was anything but an armchair theorist of a new left. He thought of politics as a profession, requiring commitment and hard work, and not as a psychoanalytic transference leading to personal catharsis, a posture he often criticized in his comrades at EELV. The demands of that high and selfless ideal of politics were no doubt too great to attract people in the numbers required to form a political party, especially in the absence of tangible reward. So other Greens have become ministers, while Dany the Red once again retires from politics, possibly for the last time. Go in peace.