Even 20 years ago im applications with voice support had hundreds of millions of users. Msn messenger at its peak had 300 million active users.

TeamSpeak was never “here” in the first place, it certainly had its niche among certain gaming communities, but it - never - had as much traction as Discord does today. I am sure a design refresh is going to lure some older gamers back, but I am unconvinced it’ll even make a dent in Discord usage.