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.
Quite normal on most bike computers already with a slow refresh, even if they're able to refresh faster. You can't really read a number if it keeps changing all the time.
For me, it matters only when I'm futzing with the map: dragging around or zooming. For the rest of the info on the display, anything more than 500ms interval seems like a waste of power.
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.