IRC is for people to whom the word "content" sounds right out of Idiocracy. :)
I wouldn't go poking around IRC today looking for random passive content consumption. There's more of that pretty much everywhere else on the Internet.
Go to IRC, in a goal-directed way, if an open source project you use is OG enough to have an IRC channel (rather than a open source backsliding Discord) that you want to access.
If you're involved in IT incident response for a company, there is a chance that running a simple private IRC server that's entirely separate from all your other infrastructure is useful. You'll need to make sure ahead of time that everyone who needs to access it urgently, when everything else is blowing up, will be able to.