This. I like Discord because it's quick and convenient and it also is the only place where I can talk to my friends. My friends don't care about the shit services they use thus don't install the alternatives like WhatsApp > Signal.
Having to wave Discord goodbye, does pretty much mean that I wave the last bit of my online social life away. It also doesn't help that I don't like to go outside the door after a day of work...
You can disable the state-less empty tab if you set
zen.urlbar.replace-newtab
on disabled in about:configFound in release notes 1.8b: