Re:How Discord Handles Two and Half Million Concurrent Voice...
by fro0116 on Tuesday September 11, 2018 @05:00AM
(#17958144)
The new chat is a huge improvement over the old one in terms of UX, but lack of persistent history is pretty pathetic considering the amount of resources Valve has available compared to a startup like Discord.
What they added was voice chat to static groups[0], whereas before you had to invite everyone to a custom group chat every time. Definitely a QoL improvement, but not exactly "new".
0: https://steamcommunity.com/search/groups