Most of the issues stem from using Microsoft’s services (e.g. Cloud). You don’t have to get an account (I have not). Most of the other things can be turned off.
That said, if you don’t like the direction its going, you can try to work towards a migration to MacOS, Linux or Unix. I still with Windows OS for now because of a heavy investment in good software (Adobe Creative Suite 4, FileMaker Pro, WordPerfect, Fujitsu Scan software, etc.).
I’m a troglodyte still on XP and Linux for my web/database server. I wouldn’t see any productivity gains from upgrading to 10. and all the specialty software I use is now available Open Source.
I’m going all Linux next upgrade cycle, another couple of months from now. Maybe sooner if my $2,500 Obamacare money shows up.
And yet, no, W10 STILL transmits data after “everything is turned off”.
I agree. Use a local account--that's important. Go to the "Settings" page (available right in the start page) and decide what can use your camera and mike, and what else you'll allow or decline, like friendly hotspot sharing without log-on.
Microsoft can eat poopy.