We have a project base repo, which we use for creating new websites from, rather than starting from scratch. This project base is a living repo, that constantly updates based on technology. Now say we found a bug which could be confirmed to have lived in the project base for 3 months. Being able to sort by date created, we could make a list of the few last repos that were created from a faulty project base and correct the error.
We have too many websites to be able to spontaneously recall which ones were created when and from which version of the base project.