Earlier quoted context omitted.
Seems odd they're not taking advantage of their own app store to update these apps without requiring an OS update. Even Google does it on Android.
Google does that because they aren't able to make sure that every android device gets an update. Since Apple can make sure of this there is no reason to have a second way to update their apps. App store updates won't magically make the mail app devs work faster or produce more.
Hopefully they'll be able to remediate that in the future and separate the core OS deployment from the vendor-specific files. Let Google pushes the OS, and the vendor could update their own stuff separately / through the Play Store. At least there is "Project Mainline" that helps keeping those devices secure.
> App store updates won't magically make the mail app devs work faster or produce more.
Definitely, but it would make it easier to deploy a patch without having to wait for the next iOS update.