As a Java developer I can tell that many of us used SoapUI a lot in times when WebServices and WSDL was a de-facto standard for APIs. Today Postman is mostly used for REST APIs but the SoapUI is still powerful and even recently received a GraphQL support. It's one of the main tools for QA automation. Similar to JMeter that was already debianized.
I tried it now and the design remains the same :) But I hope they'll improve it. It has quite annoying popups with ads to upgrade to a paid Pro plan and ReadyAPI tool. I think it worth adding. But not a top priority. Regards, Sergey Ponomarev