I don't think I could stand to have any sort of lit-up screen doing something in my eyeline when I'm driving. I turn off the backlight on the dashboard when I'm driving at night because it annoys me.
Why would I care about speed traps or road obstacles? "Poor traffic conditions" isn't really something I can do much about, either.
Also, those notifications can likely be conveyed using audio-only warnings, anyway. Making all of this discussion a bit moot.
Finally the entire benefit of live navigation is to find alternate routes with less traffic! That is something you could literally do about.
I don't want audio alerts for anything either. It's really simple - I don't want anything in the car that beeps, flashes, lights up, makes noise, or indeed does anything that is not directly part of making the car go in the required direction at the required speed.
"I don't understand why other people would do X"
"Well, it can be because of Y, Z, or W."
"But I don't do/need/want any of those"
"..."
It's like it's a fundamental failure to understand that other minds are separate from yours and have different motives and preferences.
Traffic changes while I'm driving and it automatically updates. An accident can occur on a bridge I'm approaching and I can get detoured and save actual time that I can spend with loved ones instead.
If I'm driving later at night, construction may block off my normal route and I can still get wherever I'm going.
I also get notifications for hazards like objects on the road, disabled vehicles, or events that are going to cause traffic. (I use Waze)
And the cost is zero. When I get into my car it automatically syncs and off I go. There's no reason to NOT have it.
Taxi/ambulance drivers who are required to memorise large parts of their city have the lowest dementia risk out of all (studied) professions.