Pretty sure the only Skype chats I'm in at this one are some dev chats and the former Broken Bonds dev chat turned Fallout 4/Kerbal Space Program insanity chamber.
Discord has otherwise completely supplanted TeamSpeak/Mumble/Skype and almost supplanted IRC for me as well.
I really dislike Discord, all the relevant people I can reach on Skype and I don't see any point in switching myself, personally.
If people want to switch, go ahead and let them. That just means having 2 chat programs instead of one, since there's a number of people who dislike the alternative to Skype even more.