> Yes. Google Maps has pretty good coverage of popular trails and topography and can be used if you have signal.

Ah, I was thinking back country - everywhere I've gone there's no signal, and if I'm front country, you can always just use the obvious trail markers.

Your use case for direction finding isn't relevant to an urban user. If you are familiar with the area, chances are you don't need a topo map, and you don't need to orienteer your way either - you'll understand the street numbers and landmarks. I'm also confused as to how using google maps affects your ability to become familiar with an area - I've found that by the 3rd time I've gone somewhere I no longer need maps at all, but I was using it up until then.