Above all, Google Maps repurposing it for zoom. Like, I'm scrolling down a webpage, there's an embedded Google Map, and suddenly it stops scrolling and starts zooming in by orders of magnitude and it's just a WTF moment... you're breaking the web. Nobody wants to zoom by orders of magnitude like that. Nobody asked you to stop scrolling the page. It's beyond useless.
Likewise, this is doing the same for numbers, at least in Safari. Again, nobody wants that. I can't think of any good reason ever to have that as a "feature". I can't even imagine what goes through the minds of people who think that's a good idea. Worst. Design. Decision. Ever.