"gwt" does makes most developers sad, it sounds old and outdated.
don't get me wrong I like gwt a lot, but it just does not sell...to developers/management
basically you are using only gwtc which could be j2cl in the future.
both are transpilers to get from java to js
the project is not using most of the stuff gwt is known for anyways like the components
please drop "gwt" from the title