Big no to NoSQL: This showcases how it optimizes either reads or writes. You can't do both.

nosql-optimize-reads

{
    "users": [
        {
            "_id": "user1",
            "email": "user1@example.com",
            "name": "User One",
            "gender": "male",
            "friends": [
                {
                    "_id": "user2",
                    "status": "accepted",
                    "details": {
                        "email": "user2@example.com",
                        "name": "User Two",
                        "gender": "female"
                    }
                },
                {
                    "_id": "user3",
                    "status": "pending",
                    "details": {
                        "email": "user3@example.com",
                        "name": "User Three",
                        "gender": "non-binary"
                    }
                }
            ]
        },
        {
            "_id": "user2",
            "email": "user2@example.com",
            "name": "User Two",
            "gender": "female",
            "friends": [
                {
                    "_id": "user1",
                    "status": "accepted",
                    "details": {
                        "email": "user1@example.com",
                        "name": "User One",
                        "gender": "male"
                    }
                }
            ]
        },
        {
            "_id": "user3",
            "email": "user3@example.com",
            "name": "User Three",
            "gender": "non-binary",
            "friends": [
                {
                    "_id": "user1",
                    "status": "sent",
                    "details": {
                        "email": "user1@example.com",
                        "name": "User One",
                        "gender": "male"
                    }
                }
            ]
        }
    ]
}

nosql-optimize-writes

{
    "users": [
        {
            "_id": "user1",
            "email": "user1@example.com",
            "name": "User One",
            "gender": "male"
        },
        {
            "_id": "user2",
            "email": "user2@example.com",
            "name": "User Two",
            "gender": "female"
        },
        {
            "_id": "user3",
            "email": "user3@example.com",
            "name": "User Three",
            "gender": "non-binary"
        }
    ],
    "friendships": [
        {
            "_id": "friendship1",
            "user1_id": "user1",
            "user2_id": "user2",
            "status": "accepted"
        },
        {
            "_id": "friendship2",
            "user1_id": "user1",
            "user2_id": "user3",
            "status": "pending"
        }
    ]
}