In a word the reason MongoDB was and is popular is "objects." Objects are hard to store and retrieve in relational databases, despite countless attempts to make

In a word the reason MongoDB was and is popular is "objects." Objects are hard to store and retrieve in relational databases, despite countless attempts to make it work. In MongoDB you just pop them into a table and fetch them back as needed. You don't need to define schema. In fact, you don't even need to define tables. MongoDB creates them automatically. It's still surprising to me how many people don't see how great this is for full stack developers. It makes up for a lot of other sins.