Chris Lee, a former Googler on when Chrome tried something similar to iOS 15's Safari:

Chrome Home lives on as a lesson for both myself and the whole Chrome team about the intentionality needed to innovate within a product of massive scale. Some might argue that we never should have tried such a thing; others might say that we should've seen it through. The approach I took here is one I stand by: try boldly, but be willing to question yourself.

The Chrome mock up, for what it's worth, happens to look a whole lot like my Maps-inspired concept from a few weeks ago. Someone's going to crack this nut, I'm sure, but it ain't easy to do when it's a core app used by over 1 billion people.