At least for me, webapps are just 1 in a thousand tabs open in 500 browser windows (ok, I exaggerate a bit). For an app with it's own window I can just hit a shortcut and said app gets focus.
Disclaimer, not an Elektron fan.
Different screen share features only work in the app. I'd use the web app if all I needed was chat, but I'm on video calls and using screen share constantly.