I have said this before, I just can NOT understand how you can measure adoption of a technology or product without giving people a full opt-out.

This is very basic in technology products.

It is very easy to say that Gmail AI product has 1.8 Billion users because there are about 1.8 Billion Gmail accounts/users and they have absolutely no way of completely opting out. (opting out without the company punishing users by taking away important features)

A simple A/B Test with just 50,000 or 100,000 users depending on the product will give everyone the REAL picture of where users stand.