In fact, there's no need at all. Some of the most complex malway (viruses, to be specific) every written (Zmist, MetaPHOR), which the post author would "appreciate", never had any wide diffusion; Stuxnet accomplished its task.

All in all, the post author just wanted some attention.

Exactly. If it did the job why showing the enemy (and the world) all your cards, so they can learn your most advanced tricks? It's better to keep some advanced techniques for the next target than to expose them with no need.