Right, and even the use cases for software can change in such a way that it can influence the entire architecture. "We want to design a simple rocking chair fo

Right, and even the use cases for software can change in such a way that it can influence the entire architecture. "We want to design a simple rocking chair for a sweet elderly couple." becomes "We need to make enhancements to this chair to equip it with an ejection seat suitable for a fighter pilot in a jet. No, you can't start over either, there isn't enough in the budget for that."