"I heard from a company that uses local storage for offline no-connection available that had local record[s] of animals getting vaccination. The update 'erased' all the data. They don't know which animals got [a] vaccine and can't repeat on all of them. Serious stuff,"
Not to defend Google here, but in this particular case some blame must lie at the application developer's door. This sort of data is indeed "serious stuff", so to trust its storage only to a client device, and not to maintain a copy on a server somewhere seems sloppy.
