Additionally, Discord has private rooms suitable for small groups. Reddit as a platform is not so suitable for small groups of friends, even though it supports private subreddits.
And speaking of IRC, even some games like the original Quake used IRC for in game chat right? And Twitch the video streaming platform used to have its chat built on IRC but I don’t know if it still is. Either way, it’s evident that it is more suitable for real time conversation.
Reddit meanwhile made a half-assed attempt at real time chat, and it’s not good. I kind of wish they had just stuck with being what they were but I suppose at least trying is a good idea even so. But I don’t think their real time text chat is compelling nor competitive with Discord text chat.
Sure, IRC is all delivery and no permanence. But Discord is the opposite of that; it's all permanent forum posts.
"More suitable" is a weird thing to say. They refer to different things. IRC is a transport protocol. Discord is a website. The logical comparison would be between IRC and HTTP.
Sorry if that part was unclear but I was saying that Discord and IRC are more suitable to real time communication than Reddit is.
The difference is purely branding.
If I make a comment in a large Discord server, and then put my phone back in my pocket and continue my day, I am very unlikely to actually see any responses to what I said.
If you don't see the responses, that's because you didn't want to.
I regularly get so far behind on channels in an 11 person server that I just give up on reading whatever I missed that day. If Discord and Reddit can serve functionally identical purposes in your life, that's fine, but to deny that they have any functional differences to anyone is just provably false.