Most navigation software doesn't show the map from the top, but from behind looking forward, and it communicates turns and lanes to choose regardless if your angles are 90° / 95° / 85° or what map projection is used. If you are still using paper maps in your own city - welcome to the future.
Edit: And to top it off, the crossroads being 90° is a uniquely american thing - every city in europe has a naturally grown layout. Since the US doesn't give a fuck about anyone else (as seen in the vote and their renaming stuff into America) I also don't give a fuck about what maps they use.
Edit 2: If you use your current position as the center of the projection, anything close enough to be relevant stays at 90° - or so close that i dare anyone to see the difference.