As a developer, I actually like writing release notes. Release notes boost my confidence since I get to discuss all the new features I've been proud to accomplish.
So why doesn't Facebook wish to tell us about all the potentially amazing changes they've worked hard on? By writing no release notes, it dissuades me as a user to update since they're hiding the new features on us. We should get excited about these features instead of having to hunt them down (if there even are any).
This. I'm glad I'm not the only one who has been kind of frustrated with Facebook not posting changelogs for their app updates (both the actual app and the messenger app). I want to know what's changed in a new release, and often I don't see a need to update the app when it just reads "Bug fixes and improvements", since the current version is working perfectly for me.
There needs to be a change for this. I remember there used to be time when FB actually bothered to write release notes for their updates, but that was a long time ago.