How detailed? Just search for "windows 10 privacy" and there`s a bazillion articles regarding the subject. The line that "it`s okay because others are doing it" doesn`t work for me however. Especially regarding my OS, just no, no way. it`s enough hassle trying to avoid Google`s tendrils.
Of course MS won`t snatch Kaduria`s code (thought you never know, they might be tempted :) but it might scan your HDD, report pirated stuff if you have any, analyze the rest and spam you with related crap. That`s the first, easiest step. Whatever comes next, like extensive profiling and selling this data or giving it up to governments or other organisations is not a tinfoil territory but everyday reality.
If you`re fine with that that - and other crap like forced upgrades - then by all means, go ahead. I don`t mind switching to Linux eventually. And if I need Windows 10 for gaming in some future scenario, I`ll just build some dedicated and totally quarantined PC for that.