That's a good point.... You can get just about everything you get from a dedicated unit from your smartphone too. I just prefer the dedicated units and I'm not a fan of giving phone apps access to all my daily life. I can't even upgrade my banking app now that it wants location, contacts and other permissions. Yes I'm one of those... I even put tape over the camera on my laptop. Orux maps has a phone app that I do use, but seldom for biking, though that is what I think it's intended for. It actually may do too much and might be hard to use during a ride.

Turn by turn from my experience works better for some on their phone and other it works better on a dedicated device. I am not a fan of turn by turn guidance any how. Don't people know where they are??