While I definitely agree that RSS seems less mainstream than it used to be (although how mainstream it ever was is unclear to me), but I don’t resonate with the feeling that it’s not possible to use RSS like we always have.
Yes, feed aggregators like Inoreader, Feedly, and many more have some tricks to get more sources into your reader, the fact is I can still easily follow almost everything I want in these apps.
RSS is still the best way to follow the news and whatever hobbies and interests you have. It’s supported by almost every site and works incredibly well.
If you’re already using RSS, keep it up. If you’re not, consider starting.