I’m responding to this on my own site because I can’t get the interface on the Make blog to do the click right when attempting to reply over there.

I 100% agree with this proposal. Users can only choose to opt in or out if they’re able to make an informed decision about this, and for better or worse, they can’t do that. I’m pretty sure Google will market this as some sort of user-beneficial feature, assuming they tell non-technical users anything at all about this. WordPress, according to its own “bragging”, (I’m using that loosely), powers something like 40% of the web. We can’t continue as a project to pretend we have no impact on it.