I don't use reddit, discord and slack because they are not open protocols. I use them because of the network effect and only reluctantly. Look at the relatively recent success of software like bittorrent and know that idealism and commercialism both live and die by the network effect. We aren't doomed to live in walled gardens forever.
I think you can credit a win to IRC recently, too, when someone tried to buy control of Freenode and it seems (as least as an onlooker) that everyone successfully coordinated upping stakes and moving to a new network. I don't use IRC, but I find that impressive.
