For Jitsi Meet, you don't have to install anything on a PC but a WebRTC capable browser. On iOS, you (still) need an app, although Safari is starting to support WebRTC natively.
Java on the server is a safe language. I agree that any browser plugin affects security and usability negatively, and the Java browser plugin was a nightmare.
Java on the server is a safe language. I agree that any browser plugin affects security and usability negatively, and the Java browser plugin was a nightmare.