I don't think these approaches are necessarily mutually exclusive. There are some great things that can be layered on top of the foundation we've built, includi

I don't think these approaches are necessarily mutually exclusive. There are some great things that can be layered on top of the foundation we've built, including workflows. The best part about doing this is that you can maintain full transactionality within a single primary data store and not introduce another 3rd party or external service into your availability equation.