Small list I have put together for alternatives to #discord
I am looking at this from a non-technical perspective...

Willing to hear about other platforms though/

#Matrix = YES = BUT Onboarding is difficult.
#Root = MAYBE = US-Based... Has funding from Crunchyroll founder

#Stoat / #Revolt = YES = Has potential, needs time to develop.
#Spacebar = NO = Not actively developed. (Last commit 10 months ago)
#TeamSpeak 3/6 = NO = Requires joining voice channel in order to text chat.

@padraig Another alternative is actually Steam Groups.

They support text/voice chats, pretty much everyone already has Steam installed and joining groups is a complete non-issue.

For people who use Discord as a way to stay in touch with friend groups, i don't see any easier path.

https://steamcommunity.com/updates/chatupdate