Yes, I use it. I don't want to manually check every blog web comic podcast etc i fallow, everyday and see if there was a update. If I tried i would probably end up missing some, so I grab the rss feed and have it delivered to me. And it doesn't clutter my email inbox like a newsletter or email notification will.

The only reason rss isn't more widespread is, it is to useful for consumers and hard to monetize for FAANG's