We want to lo log the events of UseCase/Store.
So, Some example directly implement logger like ContextLogger.js.

The logger should be plugin/middleware like redux/connect.
But, We think that plugin should not change almin's behevior.

Allowing to change the behavior of core(almin) make plugin flexible. But It come with complex plugin's dependencies.
A plugin depended on B Plugin that depended on C Plugin ...

It is good that starting read-only plugin system like logger.