I have a lot of troubles with a small private instance of Rocket chat, all due to MongoDb stuff, versions, migrations and backups. I bet almost all private instances of Rocket chat would be perfectly served with Postgres.

Posts like this can be tiresome, yet the general consensus among developers seems to be "yeah, Postgre/SQLite is ok for 99% of the cases, but MY case is going to be in the 1%, because I am going to be the next Facebook".