Today 04/09/2019, I noticed that there is a new v.4.1.0 version of the Experience Cloud ID Service extension for upgrade. Before doing an upgrade, I want to read the extension's release notes.
When I went to the Experience Cloud ID Service extension's release notes page (linked below), it only has info for v3.1.0. When I click the "Extension Info" item in the extension's "Configure" dropdown, I get an "App not found." page within the Adobe Exchange (linked below).
The release notes for the Adobe Experience Cloud ID Launch Extension have not been updated in quite some time. As of today 09/25/2019, the release notes have not been updated since May 13, 2019 and they only document up to version 4.3.1. Looking at the Launch Extension, the current version is 4.4.1 and I know that there has been a version 4.4.0 released in-between. Since there is no way to revert an upgrade of an extension, being able to read the release notes is very important, so that one knows what one is committing to when upgrading.