These posts, like this one.
It called for a response, so here was mine.
I completely disagree. Maybe what you built back then wouldn't be possible, but RSS feeds for topics and tags are still prevalent today. RSS is stil around, it never "died," because it wasn't a living thing in the first place. I suppose you could say it became less relevant, however, there are a decent amount of people who still use it, including me. There are also an ever-growing amount of people who are deciding they're tired of social media platforms, citing multiple reasons.
No, we haven't lost RSS, it's still here. There are people still using it.