nce the release of Spring Cloud Greenwich (v2.1), some of the Netflix tools have been placed in maintenance mode in Spring Cloud. 

The reasons are that Netflix is not adding new features to these components and there are better alternatives available.

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Netflix Hystrix: replaced by Resilience4j.

Netflix Hystrix Dashboard/Netflix Turbine: replaced by Micrometer and monitoring system.

Netflix Ribbon: replaced by Spring Cloud LoadBalancer.

Netflix Zuul: replaced by Spring Cloud Gateway.

Archaius: replaced by Spring Cloud Config.