Quote from Mike H on February 24, 2023, 10:22 am

This post is a feature request for automatically adding a default retention period to workflow history lists on creation of the list.  We would need to retain the ability to adjust the retention on a per list basis and be able to set the default time period.  Alternatively, perhaps history lists could be of a unique content type, and we could set a default retention policy for that content type?

The history lists are incredibly useful, but at some point, the data becomes obsolete and should be purged, especially on very active lists where the item count can climb into the millions very quickly.

We have hundreds of history lists, and our power users are creating their own workflows.  Keeping up with all of the lists and ensuring they have retention applied is a time-consuming job that we shouldn't really need to do.