Sure security is important but integrity is too.
* iTunes/Music app randomly reassign my Album artwork, with different (incorrect) art showing up on different devices!
* Reminders app: shared reminder lists can end up with the name of a different list
* Ghost photos that are deleted from my phone, and come back later.
* Maps, when I say "navigate to $friend" set a route that ended in my own driveway.
To me, these bugs suggest a fundamental design flaw, perhaps they are using a simple Integer as an index rather than a UUID?
Or maybe the database schema are solid, but there's some sort of race condition in their synchronization frameworks and the data is getting scrambled in RAM?
Whatever it is, it's absolutely insane that in 2025 these kinds of bugs are happening.
I then subscribed to Apple Music and relied on its matching function. After switching from an Intel Mac to an M2 and redownloading my library from remote, it now believes that each and every song in my library are rented Apple Music copies. Even those it shows as having been added in 2003.
Some songs are missing; some go missing, then inexplicably come back months later. Worse: so far I have found around a dozen which have been replaced by different versions.
It's a real mess.