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NoSQL is definitely not obsolete. When you go to Amazon its not looking in PostgreSQL for your shopping cart, its looking in Dynamo. As someone who previously worked in Fortune 10 company, I can tell you that most production APIs were being driven off of NoSQL or were being migrated to NoSQL (specifically Cassandra and ElasicSearch).

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You said it quite clearly, Fortune 10, which rules out 99% of all companies out there.

And 5 if not 9 out of that Fortune 10' NoSQL dbs were just tied with a duck tape ('Our frontend team needs something they could understand - Ah okay then') to the mainframe with a previous generation of NoSQL - like ADABAS, IMS or z/TPF - and a ton of COBOL code where all the work is done since forever.

Not for OLTP I assume? Or are they using transactional NoSQL?

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