Wouldn't people just leave? I feel like that's such an easy thing to do these days. If they are too old, they probably weren't using Chrome anyway and default to edge since its just there. I know not everyone would, but I wonder what the percentage would be in the end. They have been killing it themselves lately with the removal of the blockers. I've been on Firefox for over a decade now. If Firefox did something like this, I would be gone in a day.