Serious question: as a user (not as a developer!), have you ever seen substantial improvement in a piece of a software from a ground-up rewrite?

In other words, have you ever used (but not co-developed) something where the developer(s) decided on stopping evolutionary work and instead embarked on a substantial rewrite, and the outcome as you saw it firsthand was a real improvement?

If so, please state your example. Please stick to personal experience, rather than hearsay. Thanks!

@xahteiwi fish shell comes to mind. Though, it's a bit complicated, because I didn't use it before the rust rewrite - the rust rewrite is what allowed me to use it in the first place.
@algernon @xahteiwi can second that, the speed and responsiveness after the rust replacements were worlds better.