Probably won’t apply to the current i4 but maybe we’ll see this in future models (LCI?).
I'm an Android user (green bubbles rule!)You will not get 8.5 or 9 in an i4.
That said, the i4's built-in nav can tell lane and prompt to move over. And does. I've found it helpful. CarPlay can, too, but it's animated like the iDrive nav.