“Concrete is, in fact, temporary…”
Even something that I intended as a temporary structure, like a paper church I made in Kobe in 1995, can end up being permanent. That church was relocated to Taiwan in 2006, after they had an earthquake there, and it still exists today. Ultimately, what determines the permanence of a building is not the wealth of the developer or the materials that are used, but the simple question of whether or not the resulting structure is supported—loved—by the people.
Architecture made simply for profit—even if it’s in concrete—is in fact temporary. Commercial architecture is precisely that. If it is made for making money then eventually some other developer will come along and try to make more money out of it by demolishing it and rebuilding it. And it just repeats. In that way concrete is, in fact, temporary.
However, if you make architecture that is loved by the people, then regardless of what it is made of, it will be kept.