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Maybe I'm not as much of a heretic as I thought I would be :-)

Starting from fresh these days I would use something 2 way for commands, queries like HTTP REST.

But a messaging system for events.

If i'm using event sourcing use a dedicated event sourcing database with catchup subscriptions etc

> a dedicated event sourcing database with catchup subscriptions etc

Can you recommend any?

Greg Young's Event Store[1].