> As far as I know they give you the option to opt out of everything

The thing we now know as "telemetry" used to be opt-in, and they hide the opt-out control during initial setup behind a thing that is a link but doesn't look like one.

It can still be turned off after installation in the same exact way as the previous versions of Windows (enter "experience" in the Start menu search box), but most won't know that this control exists.

All the rest of the things causing people to freak out about privacy are related to Cortana, and the process for turning that feature set on is in-your-face opt-in, where it's clear that you're authorizing data sharing with them.