SR1 delivered to everyone, or just Insiders, in early August? It would seemingly be a big mistake not to filter something like that through Insiders first for two or three weeks or whatever. I...
It sounds like the answer is no:
Q: Will the insiders have to reinstall W8 to register for the W10 upgrade?
Yeah, there's no way that I'd go through that (and Symbols, as I recall, are a huge download encompassing scores of files).
I see that there's a "WindowsUpdate_AU_deprecated.log" file that'...
It could have been in reference to BYOD. Apple has huge numbers of iPhones, iPads, and even laptops in the hands of those in the U.S. (especially), and businesses have to deal with them.