Thought of as philosophic anarchism, it can become trendy. But the alternative is not ossification. Ideas held too long without action become ideals. Ideals may inspire. But they can also be kept too long in the fridge.
Parties become monuments to dead leaders.
The profession of anarchist ideals is no guarantee against this. Syndicalist movements may become large, and therefore be compelled, in order to serve their members, to bargain with capitalism. Anarchist movements may fall into bureaucracy in an endeavour to preserve property against outside takeover. An ossified federation is only a memorial to past activity, and this proved at Carrara to be the case with many of those represented, in particular those preserving, in exile, a past historic role. Even a movement based upon activity can become ossified in the future.