My two cents worth...if that:
Just did an update on my Garmin Nuvi Drive. It went seamlessly....other than it took forever because I hadn't done it in a longggg time.
I am not so much interested in on-line navigation. That's easy via a cell phone app. Where I really want the assistance is often in places that doesn't have cell service. So I prefer a system that works off-line.
Outfitting both a new truck and UTV so I thought I would try using a tablet that I could switch between the two vehicles. Bought a tablet and figured out a mounting system that would work in both vehicles. Have been trying out a few different navigation apps (there are dozens) but, so far, I haven't found one that is as easy to use as the Garmin. Often we don't need turn by turn navigation, just use the moving map display with elevation and heading on the display. I think I am just gona get a couple new Garmins for the two vehicles (my old Garmin already found a home in the wife's vehicle.
I am familiar with the fancy built in map displays (both the truck and car have them). But they have to be linked to a cell phone to work and, unless you set it up in advance, they need internet to function. A dedicated Garmin is just so much easier. Just get in and drive.