> I am sure there are use-cases where the risk of this design is acceptable (or necessary), but ensure you have a plan for dealing with data inconsistencies!

I'd argue most non-financing applications would find these risks acceptable. This form of Multi-Master is what most people writing web-based applications actually are looking for. It simplifies having fail-over, at the costs you mentioned, but those aren't a major issues, especially if they're known upfront.

> * Datasets will diverge during network partitioning

> * Convergence is not guaranteed without a mechanism for resolving write conflicts

While this isn't ideal in a perfect world, it's workable for, again, web-based applications where consistency isn't usually required. Also, the rules are known http://bdr-project.org/docs/stable/conflicts-types.html

So yes, there are definitely workloads where this type of replication isn't appropriate, however, acting like there aren't any is blatantly ignoring many types of workloads.