As far as I can tell, Discord doesn't delete history so you can join an older discord and scroll back. 99.99% of slacks that are free lose history after some arbitrary timeframe (used to be 10,000 messages, now I think its 90 days). Plus you can connect Discord to your Steam/Playstation/Xbox account, which gamers like.
WorldMaker|5 days ago
inetknght|5 days ago
This is exactly the reason cited for several non-gaming discords I'm in.
KennyBlanken|5 days ago
People, do not use discord for conversations with family/friends that you want to have any chance of holding onto, even just a year later.