I agree. I have learned as a general idea "use the fancy new thing if the pain of not using it is costing you a lot of money", because having your data nice and structured, typechecked in a relation DB with a query engine is the sweet spot for most applications. Firebase taught me this lesson. If you have an app with user ids and user profiles, and another records (plural) references them, you need a join, and non-relation databases suck at joining data.

Having data flung about the place in these objects sounds a bit scary (how do I back them up, and keep track of them, how do I join data from multiple objects, and what if those different objects are all around the world).