Robot Framework 5.0 is a big new major release with lot of interesting new features such as TRY/EXCEPT, WHILE, inline IF, RETURN, BREAK and CONTINUE syntax, support for custom argument conversion in libraries and various enhancements to xUnit outputs. Robot Framework 5.0 only works with Python 3.6 or newer. Robot Framework 5.0 alpha 1 is the first preview release with all the planned new syntax implemented.
For more details see the full release notes.