Every software vendor could learn a thing or two from the great presentation of FFX release notes.
This is also why I think Sparkle [https://sparkle-project.org/] is one of the best things about the Mac application ecosystem.
Edit: Should mention why, because it presents a consistent, and clear, UI for users and it encourages developers to write release notes.
Particularly the security fixes. Easy to find case numbers, impact levels and clear descriptions. All with decent spacing that makes the page feel clear and legible.
In the past you could look up changes here [1], but updates there stopped a while ago.