Easy replication. I suppose it's faster than Postgres's JSONB, too.

I would rather not use it, but I see that there are legitimate cases where MongoDB or DynamoDB is a technically appropriate choice.

Right? When they came out, it was all about NoSQL, which then turned out only mean key-value database, whom are plentiful.

because it is "web scale"

ref: https://www.youtube.com/watch?v=b2F-DItXtZs

This is a nasty ad repositorium datorum argumentation which I cannot tolerate.