We know about Resource Governor and wanted to bring something as good or better to Postgres. SQL Server classifies whole sessions into a budget. Traffic Control classifies individual queries instead. That's better granularity, especially when a pooler multiplexes multiple different workloads into a session. It also opens up more flexible classification, e.g., based on query plan or based on sqlcommenter tags carrying information about client apps, job queues, priority levels, or release versions.