That story seems excessively tidy and flattering, and in any case, its pessimistic corrolary is that most of today's philosophy is a junk drawer of dead-end intellectual projects that never yielded anything useful. The shoe certainly seems to fit most philosophical sub-disciplines, like metaphysics and ethics.
Anyway, the article is a fairly (though maybe inevitably) partisan read on the crisis of philosophy. The author pretty casually dismisses some views which are pretty popular among philosophers - examples include the idea that philosophical theories are rival, and can be disproven; and the view that philosophy is supposed to be therapeutic (the rejection of this view is especially surprising given that it was pretty much universal among the archetype philosophers, the Ancient Greeks). The author appears to favor the view that the point of philosophy is to "articulate cultural self-understanding" (or, "[promoting] cultural self-consciousness"). Seems reasonable enough I guess, but I'm not sure what it means.