I use Discord as a concession to group chats for those that refuse to use XMPP or Delta Chat

I use Slack because work and it's not really my choice

Oh, they can refuse to use DeltaChat by just... not using DeltaChat and only doing email - and me not wanting to be a jerk - since DeltaChat does a lot of things like "sending Message Read notifs" and stuff, which is real bad.

But also - my sister isn't using it so she just gets spammed by my family group chat and keeps up via email. But DeltaChat is kinda too feature creeped to be a good experience out-of-app