They’re just going to do a classical boil-the-frog operation:

Step 1: Make it opt-in and present it as the new cool thing. Step 2: Make it opt-out, and if the users opts out, show a scary warning about how the cool thing won’t work anymore. Step 3: Make it opt-out, but hide the opt-out option deeply. Step 4: Remove opt-out, but it still works with a registry hack. Microsoft apologists will still thinks it’s cool because “just use this simple registry hack”. Step 5: Remove opt-out alltogether, and automatically opt people in who had previously opted out.

You forgot Step 0: make an announcement so overtly egregious that when you walk it back, the compromise sounds reasonable