Which part of “Selenium 4” features are you interested in?
I personally am interested in the “Chrome Devtools Protocol” support in Selenim4. I wanted to do a Web UI test using browsers and at the same time I wanted to save the payload of HTTP requests and responses into a file. I expected CDP support in Katalon Studio would enable me to do it. So I checked the v8.2.1-alpha. I found v8.2.1-alpha was short for the CDP support.
Later I tried to develop an alternative to CDP. The following post describes what I have done.
By utilizing BrowserMob Proxy in Katalon Studio, I could fulfill my requirement to save the HTTP messages between a browser and HTTP servers into a file. Now I am no longer interested in Selenium 4 features support in Katalon Studio.