This device has a backlight enabled by a physical button, and navi refresh rate doesn't matter because you're riding and not staring at it. 1Hz is fine for a reference.
Not sure why needing less battery or having better at-a-glance visibility would be such a bad thing.
One need not love a device, that's ok. But digging to invent a reason to hate it also doesn't seem necessary.
Refresh rate does kind of matter. 1Hz imposes an average 0.5s latency on any update, which would be obnoxious in some situations.
You’re responding really inappropriately to someone participating productively in a discussion.