DuckDB's single-node reputation leads to a wrong conclusion about MotherDuck's concurrency ceiling. Two features break it - hypertenancy (compute per user) and read scaling (up to 50 read machines per user). A follow-up to our production review, prompted by a correction from MotherDuck's co-founder.

After 6 months running MotherDuck in production, we cut our Snowflake bill from $8K to $400/month. Here's our honest review, migration playbook, and decision framework.