I disagree.

Rewrites can happen due to new feature support.

For examlle: It's entirely possible that a synchronous state machine worked for the previous needs of the software, but it grew to a point where now that state machine is unable to meet the new requirements and needs to be replaced with a modern fam with asynchronous singals/delegates.

Just because that system was replaced doesn't mean that it wasn't maintainable, wasn't readable, or easy to understand. It just wasn't compatible with the growing needs of the application.