Datastore how to get past sync errors?

Thanks Steve, this is reassuring.

As to the more general question, we need to find a way to improve the customer experience. Whatever high the quality of the team, and it is incredibly high indeed, there will always be the next bug; we cannot assume that the user will simply have to stop using the app or reinstall. So, in a situation like this, what are the simple steps that you would recommend to implement in apps/code, that would make the user able to continue working, albeit possibly at the penalty of some, hopefully minor, data loss?

I'm thinking of things like dropping the chain of unsynced deltas. I would like to implement this before releasing the app, if possible. We have better be prepared for the worse than have to deal with it in the field when hours are few and stress is high.