At architecture school, Tschumi was one of a select list of heroes from far off shores producing seductively complex diagrams to discuss the disintegration of form against a backdrop of linguistic theory telling us that signified and signifier were irreparably disconnected. Process began to become key and the layering of multiple but individually linear trains of thought were the only way to generate meaningful discourse. Two of the key outputs from this way of thinking were the Jewish Museum, Berlin by Studio Daniel Libeskind, and Le Parc De La Villette, Paris by Tschumi, along with his seminal book about cross programming, Event Cities. You might note that another process, diagram driven practice, OMA was a close runner up in the La Villette competition.
OMA went on to build prolifically, spawning numerous other notable firms from their factory in Rotterdam - BIG / JDS (formerly PLOT) Foreign Office etc. Libeskind took the aesthetic hard won from 10 years of process on the Jewish Museum and pimped it out as charicature for profit for the next 10.
Tschumi, interestingly, retreated into research and teaching, always maintaining practice of some sort or other, but building remarkably little. I like to think he spent most of his time in a small room smoking and drinking coffee with Peter Eisenmann and Michael Sorkin, but that could be slanderous....
The Acropolis Museum is evidence of this. It masterfully deals with a complex site and a difficult programme. It is beautiful when approached from any angle, particularly above from which perspective Acropolis visitors will notice it. However, it bears the hallmarks of an architect who hasn't built much. Whilst the diagram is resolved cleverly and the photos are there to be taken, there is no one remarkable spatial experience inside. Detailing bears the scar of decisions made from assumption and dogged insistence rather than experience. Notably there is the elaborate double skin glazed truss to the windows on the top floor. Presumably this was to avoid glazing bars and preserve the view, but the proliferation of clips, fixings and edges achieves precisely the opposite.
An architect, still I think, is someone who designs buildings to be built. Tschumi, one of my heroes, is not yet this.