My concern would be whether Mongo will cause me to lose data.... "To recap: MongoDB is neither AP nor CP. The defaults can cause significant loss of acknowledge

My concern would be whether Mongo will cause me to lose data.... "To recap: MongoDB is neither AP nor CP. The defaults can cause significant loss of acknowledged writes. The strongest consistency offered has bugs which cause false acknowledgements, and even if they're fixed, doesn't prevent false failures." https://aphyr.com/posts/284-call-me-maybe-mongodb https://aphyr.com/posts/284-call-me-maybe-mongodb ...or get my data corrupted: "When MongoDB is all you have, it’s a cache with no backing store behind it. It will become inconsistent. Not eventually consistent — just plain, flat-out inconsistent, for all time. At that point, you have no options. Not even a nuclear one. You have no way to regenerate the data in a consistent state." http://www.sarahmei.com/blog/2013/11/11/why-you-should-never-use-mongodb/ http://www.sarahmei.com/blog/2013/11/11/why-you-should-never... When you refactor or rewrite your code, you have the old code in version control, can write tests to confirm that it still works as expected, and there's no inherent time pressure. If you pick an unreliable database and your data has been or is being lost and/or corrupted, it's more like a "try to stop the bleeding before the patient dies" situation. That's not the time I want to be considering changing databases.