With the announcement that the cc and v2 apis are getting deprecated (API Deprecation Announcement), and some cleanup is happening with the beta and V3, it seems like several of the API References have had Deprecation Notices added to them. According to the link above, the APIs are likely/eligible to be removed after 12 months.
In an effort to better assist the deveopers with this change, I propose the inclusion of the date the Deprecation Notice is added to the API so that users know when the 12-month clock starts. Here is an example of one such instance: update-campaign | SailPoint Developer Community