What I absolutely hate is the generic release note that seemed to come about with agile release schedules. Notes like, “bug fixes and performance improvements”, “Thanks for using <app_name>, we make regular improvements to ensure your experience is top notch”, or “We update our app often to <insert_marketing_taglines>.”
This tells me nothing and makes me less likely to bother reading any release notes at all.
I use release notes to help me decide whether not to update to the new release. I would prefer that no release note is made at all over that kind of thing. At least that's being honest about not wanting to say what the changes were.
This will keep existing users on the app for longer. If you're a project manager or manage an app, this is definitely something you should care about.
Also, I'm trying something out here because I saw a loophole, let's see how it goes :)