Required Migration to Unified Catalog

For Learn, we have some pages in redwood and have self-paced learning and events on as an option and our integrations use self-paced learning. However, we are still building in the olde UI of courses/offerings.

Due to bugs, we have not undertaken the task of training our team and moving over until the bugs have been fixed. I think we may be close, but wanted to know when the cut off date of when we need to move to unified catalog is? I saw a roadmap posed from earlier this year, but it wasn't clear about unified catalog in the material.