Got to say that, although I work for (and therefore depend for my livelihood on) a company that does the engineering on these sorts of projects, and although they are ingenious, clever, and breath-takingly elegant engineering solutions, they do rather prove the point that such buildings/structures can only exist because nobody took the crayons off the architects quickly enough.
Not all, but too many for comfort.
To be blunt the engineering is like polishing a turd - it doesn't matter how well you do it, all you have at the end of it is a very elegant turd.
Still, it pays my rent, and the client has to live with it long after I've moved on to the next project!