You had to manually advance the instructions and if you went off route you had to go back and generate a new route from current location. These are pretty fata

You had to manually advance the instructions and if you went off route you had to go back and generate a new route from current location. These are pretty fatal limitations if you are using it while driving although it worked fine for walking. As others have said without knowing the Google/Apple maps contract details we don't know if Apple could have given customers the choice.