I love information like this, and I think the OpenSignalMaps opinion is healthy. Basically, it's cool to have an install base this diverse and dynamic. Maybe this is because I come from a traditional desktop dev background where diverse HW and SW environments were just part of the game.

I recently co-created an automated web-service that tests apps on real devices, and of the thousands of tests we've run, the majority of the failures and errors are more general software development issues. Errors caused by assumptions about the presence of other apps or network connectivity or the inability to handle certain transitions like screen orientation are much more common than device-specific problems like CPU type. It does happen, for sure, but not nearly as often, and free services like ours seek to mitigate these errors altogether.