SQLite for little apps that are easily deployable, and PostgreSQL for more serious applications that would benefit from its extensions. I haven't changed that

SQLite for little apps that are easily deployable, and PostgreSQL for more serious applications that would benefit from its extensions. I haven't changed that setup for years, even when people tried to convince me that Mongo was the superior way to store JSON, which I do in Postgres very easily. (I also don't need Redis because most of my applications are in Erlang/Elixir, so we already have a bunch of Key-Value solutions available) So yeah, pretty happy :)