> a DTS person

Quinn the Eskimo, no doubt. I'm convinced he or she is the only actual human being providing developer technical support at Apple. Certainly the only one I've ever successfully communicated with. Support tickets go to robots who are incapable of providing relevant answers. Maybe Quinn is an alias with a team of humans behind it, but I don't think so. I've had him or her take forum posts to private e-mail and it does seem like a single person.

Unfortunately, even Quinn is fully at the mercy of Apple's internal bureaucracy, which is quite formidable.

Yeah, it was Quinn. I didn’t want to name them and seem too knowing haha.

It's not much of a giveaway. Quinn is the most likely respondent to questions on https://developer.apple.com/forums/ for years now, including this one about sandbox-exec in 2019:

https://developer.apple.com/forums/thread/124284

:-)

Not the only one, but the most prolific that’s for sure.