"The IPCC has reached the end of its usefulness"

I actually agree with this paragraph from a typical alarmist article :

In fact, I think that with the release of the recent synthesis report, the IPCC has reached the end of its usefulness. Anyone who isn't persuaded by that document and the general desperation of international climate scientists is unlikely to be moved by yet another such assessment and more begging. In particular, skeptical Americans are unlikely to be convinced by another international report that focuses on international climate impacts.