@arclight
As a (possibly terrifying) thought experiment, I wonder what a project like constructing a bridge or a power plant would look like if you tried using software development processes to guide it.

If you take the approach of actual safety-critical software (embedded stuff like braking systems or avionics) it might be weird but not ultimately not too bad. If you used web app development I doubt you'd get as far as breaking ground before people wind up injured or worse.