Yes, I know that in Win7 I'm still free to opt out of the CEIP. KB3035583 is the big bad GWX update. I still prefer not to install those other updates
Fortunately, MS is only offering these up as optional updates. Diligent Win7 users will be able to avoid any updates they prefer not to install. I posted my list of updates I wish to avoid. Some may agree with it, others may disagree. While running Win7, we are all still free to say "no, thank you". Win10 users no longer have that choice.
To the Win7 users who are freaking out lately: Don't install the GWX and CEIP/Telemetry updates. Problem solved! It's really that simple! I've even listed them all for you. You still have the power of choice and nobody is holding a gun to your head.
Eventually, I'm sure that some hackers will come up with ways of disabling the forced updates and telemetry in Win10. When that happens, I will consider putting it on my main desktop PC. Until then, I'm sticking with Win7 and eyeballing Linux as a potential replacement.
I don't buy Microsoft's claims that the forced updates and telemetry stuff are absolutely necessary. We've had them disabled for the last 20 years and have somehow been able to function without them. I highly doubt that Win10 is something so special as to require this stuff. There's no reason for them to make this stuff mandatory and the excuses are lame.