[exodust]

Because people will typically use Google maps, and Google only provides one month of offline map data before it demands to be put online again to "refresh" that data.

Honestly, the way Google changes the goal posts and rearranges the furniture within its own apps, I stay well clear of that mess when I need consistency and reliability. My phone remains a phone when I'm driving and need an uninterrupted, non-internet, non-phone navigation device.