Most important enhancements: - [New SKIP status](https://github.com/robotframework/robotframework/blob/master/doc/releasenotes/rf-4.0.rst#new-skip-status) - [Criticality has been removed](https://github.com/robotframework/robotframework/blob/master/doc/releasenotes/rf-4.0.rst#criticality-has-been-removed) - [Native IF/ELSE syntax](https://github.com/robotframework/robotframework/blob/master/doc/releasenotes/rf-4.0.rst#native-if-else-syntax) - [Support for nested control structures](https://github.com/robotframework/robotframework/blob/master/doc/releasenotes/rf-4.0.rst#support-for-nested-control-structures)
