Perhaps the documentation could be updated to formerly deprecate this?
Indeed it would. You can help that along by filing a bug against the Entitlement Key Reference doc. Please post your bug number, just for the record.
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Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware
let myEmail = "eskimo" + "1" + "@apple.com"
Here's the bug #:
Dude man 7