Overwhelmingly the word I'd use to describe Discord's interface is "one". There is one interface. It's an interface that most people seem to like, but we've lost an important freedom there. It's against the EULA to modify your client or use an alternative one.
If with IRC one can have any interface, I would not call Discord's better.
Whether we should be using text chat clients as FTP clients is another issue, XMPP is better for multimedia messaging.
Plus the concept of +v doesn't really exist on discords. Sometimes you'd be stuck lurking while only a select few could speak.
And frankly being able to embed images/videos degrades the seriousness in various ways as it can become a bit of a meme/comedy competition (and they scroll disproportionately more text off.
And avatars mean less space is actually text..
<[@+]?shortnick>: <text>
is pretty much the optimal format for information density, which is ironic that twitch chat uses it (to mostly spam emotes)
At least part of that is that the search in Discord is horrifyingly bad, and isn't available via search engines.
I don't mine Discord as a place to ask questions / discuss; but it's far less dysfunctional when combined with a wiki.
In general it has a much lower barrier of entry. With all the good and bad that brings.
For the record I think it’s a miss in general. But YMMV.