Spring Cloud Openfeign Why is @EnableFeignClients needed in spring boot?

Hi, May i enquire why @EnableFeignClients need to be explicitly added in spring boot in order to use it, since spring boot should be able to detect the presence of the feign dependencies, and automatically enable it.
This is akin to spring MVC where developer doesn't need to explicitly add @EnableWebMvc in spring boot

Comment From: poolsnowhui

There may be performance impact.

Comment From: OlgaMaciaszek

Using the annotation allows a more fine-grained control, including allowing to specify only certain clients to be enabled.