Actually there are some good reasons, the best one being that if you're on the road going 100 - 150 km/h and you only DL small maps, you're going to run out of map pretty soon. And then you don't want to stop (or maybe you don't have where on the motorway) every hour to change maps (unless the map "joining" feature has become operational ? in whch case this would be no problem). Anyway, since I'm going to DL the same ammount of tiles, in one map or 10 smaller, and since it's another app doing all the traffic, I don't see how that would reflect bad on your (very good) work.
I'll try to find that limit empirically, now that I have all these tiles in the tilestore and all
Edit: And I found it, approximately. It's closer to the lower limit than the higher from those mentioned above.
I'll try to find that limit empirically, now that I have all these tiles in the tilestore and all
Edit: And I found it, approximately. It's closer to the lower limit than the higher from those mentioned above.