The level of specificity in the complexity I think makes it unique. At any given time, there might be piles of complexity that nobody has ingested at the momen

The level of specificity in the complexity I think makes it unique. At any given time, there might be piles of complexity that nobody has ingested at the moment, and would take time to dig through to get caught up. A builder can look outside his window to get a crude idea of how far along the project is. In software, it's often really, really hard to tell.