a sarcastic reply serving no purpose
There was enough needless sarcasm dripping in your OP that I figured maybe you would appreciate it.

In any event, if you don't care to actually play the game, just want to see who among your friends is online, and also happen to have a battery on your device that's older than Jesusaurus, things like Discord exist. They really don't need to waste time and resources for launcher bells/whistles. If you and your friends cared enough to stay in contact without needing the game to do it, you'd find ways.

Incidentally, I looked at your WoW launcher screenshot, and one big question came to my mind: What do I hit to actually play the game? You'd think that out of everything featured in a launcher, it would at least make THAT clear.