That's no longer the case. Google's "For You" gets me my niche subject-specific content, Google News/Memeorandum (and its sibling sites)/Apple News gives me the mainstream media perspectives, HN (and maybe Bluesky occasionally) my urge to discuss and engage with others, and YouTube Shorts (I refuse to install TikTok) helps me understand Internet culture.
I don't think any one company came for Reddit on their own, but what they've left Reddit with as a differentiator are the communities. Unfortunately, those end up existing as little fiefdoms for the moderators who run them, and if that's all you're going to offer, you're not going to be able to justify that $10-$15bn (probably lower now) valuation to investors.
Yeah, I pretty much only use reddit for a few game communities, unfortunately with this change I suspect more and more people will move to discord. It's pretty annoying, but I suspect I'll have to eventually cave and join them when they finally kill old.reddit.com.
IRC itself doesn't provide a shared history, threading etc.
You could get there with alternative clients and bots (at least if all participants use the same), but calling that IRC is a stretch