Similar here, there are gotchas though. Some versions ago they've changed their query optimization engine - some of our "slow aggregations" become "unresponsive aggregations" because suboptimal indexes were suddenly used. We had to use hints to force proper indexing. Their columnar db offering is quite bad - I'd say if there's need for analytical functionality, its better to go with a different db. Oplog changes format - and although its expected, it still hurts me every now and then when I need to check something. Similarly at some point they've changed how nested arrays are updated in changestream, which has broken our auditing (its not recommended to use changestream for auditing, we still did ;) ). We've started using NVM instances for some of our more heavily used clusters. Well it turned out recovery of an NVM cluster is much much slower than a standard cluster. But all in all I really like mongodb, if there are no relations - its a good choice. Its also good for prototyping.
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