Also, Bermuda is supposed to grow faster and more dense than SA and most weeds. Since it's in a seed I can over seed an area to crowd out weeds. (https://edis.ifas.ufl.edu/lh007
) My water retention pond in the back yard means I don't pay for water for my lawn so that is not an issue. So why wouldn't round up / renting a tiller and seeding the area be less expensive than sod?
I could see your point if I actually cared about saving my SA.