This particular wall could not rise much higher. All too soon it would be time to work on the plumbing. Oscar hated the plumbing, always the most troublesome construction element. Plumbing was a very old technology, not so plug-and-play, never so slick and easy as the flow of computation. Plumbing mistakes were permanent and ugly. When the plumbing’s time had come, the Bambakias construction system would wisely balk. All higher function ceased until people came to terms with the pipes.