> Admittedly, I haven't used IRC much and I know the UI/UX isn't the best,
I mean, you seem to understand what's wrong. IRC is meaningfully worse to use than Slack/Discord. So people use stuff that's nicer to use.
> but that could probably be fixed pretty easily and tacked on to the existing messaging infrastructure?
If it were easy, it would have already been done. "The UX isn't great" isn't a recent discovery, it's something that's been known for a very long time.
I regularly use two messaging platforms: Discord, and Element. The former is proprietary and the latter is open. Element is meaningfully worse to actually use. And it's still the best Matrix client I personally have used.