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."

In which case perhaps the reasonable solution is for you to get a different type of chair, rather than trying to modify your old chairs to fit the changing requirements.

If your chair covers the area of Los Angeles, it'll sure have problems with changing landscape. If it's a regular-sized chair, less so.

Yes, but now we've clearly abandoned the familiarity of the analogy, making it less clear how much value the analogy has in illuminating what we're trying to say.