[jpgvm]

Yes this is definitely also true.

Druid complexity is coming down a bit compared to where it started. These days you need brokers, middlemanagers and historicals - for queries, ingestion and storage respectively.

In the past to do batch ingestion it also required Hadoop but there is now a native parallel batch ingestion system that runs on the middlemanagers as worker tasks that can read from S3/GCS/existing Druid segments.

Druid is by far the more complex but you get a lot for it and with k8s it's not as hard to run/manage as it was in the past.