Docker is like MongoDB. It was cool for a while, until everybody realized you don't actually need it.
I dream of SQLite with temporal tables..
MongoDB marries well with Node, and things like json-patch.
Especially great when dealing with graph-like structures, though jsonb data types in recent rdbms' have gone a long way towards evening the playing field there.
I've also come to appreciate Mongo's pipeline approach to aggregation. I hated it with a passion at first, but when coupled with Compass, I've found it makes aggregation stages much easier to reason about than the equivalent SQL.