...Interoperability at this level means libraries can drop their own caching implementations and easily rely on the one given to them by the framework, or another dedicated cache library. PSR-6 solves this problem already, but in a rather formal and verbose way for what the most simple use cases need. This simpler approach aims to build a standardized streamlined interface for common cases. It is independent of PSR-6 but has been designed to make compatibility with PSR-6 as straightforward as possible.