Ask HN: Which OSS systems have been rock solid to run in prod?

I’ll start: Redis and Postgres just work in my experience and perform fairly well under load.

By contrast - have had painful experiences with Zookeeper and HBase.

Cassandra, ElasticSearch, and Kafka are somewhere in the middle.

Curious about RedPanda, DragonflyDB, ScyllaDB, Materialize, and other newer systems.