Partitioning is how a big table learns boundaries. Split by month, and queries for March never touch February, retention becomes dropping a segment instead of deleting rows, and maintenance stops needing an outage.

Partitioned Peace is the calm that comes from choosing the partition key well, which means matching how data is actually filtered and expired. Choose badly and you get thousands of tiny segments and a headache. Choose well and operations become pleasantly boring. Queue it for the day you finally draw those lines.