Electron != web app. Have you tried using Slack's actual web client vs the Electron app? I personally strongly prefer the stand-alone client. The same with the git GUI client. The equivalent web thing is github.com.

If the original statement was "I prefer Electron for my desktop apps over Qt/Wx/GTK/etc." I could totally understand that. But the original comment was "My 'go to GUI' is a web app". That's not the same thing. It is our modern version of "when all you have is a hammer, everything looks like a nail."