The entire point of discord is to be able to used by anybody (like skype) and also take the perks that each VOIP system has, like file sending, video calling and screen sharing (work in progress), chatlogs, private channels, roles and all that stuff.
The only unsettling thing to some people and somewhat me is that you aren't actually the one hosting the server, whereas you are with mumble and teamspeak. There's also other minimal stuff but mainly it's gotten a lot better and there's a reason why it's getting big.