DRIVERS-3427 : Summary of necessary driver changes Remove all token bucket code. Remove the adaptiveRetries client knob and URI option. Add two new client knobs/URI options: maxAdaptiveRetries and enableOverloadRetargeting . Full details in #1b15cd2 (see client-backpressure and uri-options changes) Drivers should include the following release note: "Added support for MongoDB 's Intelligent Workload Management (IWM) and ingress connection rate limiting features. The driver now gracefully handles write-blocking scenarios and optimizes connection establishment during high-load conditions to maintain application availability," with a link to IWM page in Atlas, which which will be available with DOCSP-55426 & related Driver Docs, which will be available with DOCSP-57078. Drivers should also ensure that the two new client options are documented in their official connection option docs. Commits for syncing spec/prose tests (and/or refer to an existing language POC if needed) #1b15cd2 : There are both new tests added and existing tests updated. Context for other referenced/linked tickets