The way I understood it is that in original classic we had the ability to mimic focus using unique ID api's. When Focus was added to the default UI behavior we lost Unique ID access.
Now Focus is being removed from the default UI but the unique ID access is not being restored so we lose both.
Edit:
https://us.forums.blizzard.com/en/wo...the-api/188182 Long post requesting focus to be added back in some form with history and explanation.
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