Sure, I use Feedly myself, but RSS is increasingly marginalized. I use to follow blogs, but it's not usable for mainstream media, Reddit, HN, etc etc.

> Reddit, HN

Hacker News still has a feed (that's the only reason why I saw this thread). And Reddit gives you a feed for your subscribed subreddits.

You can also get feeds for any subreddit, user or post

https://www.reddit.com/r/ycombinator.rss

https://www.reddit.com/user/spez.rss

something like RSSHub can be used in conjunction with your RSS reader and will generate feeds for sites that dont have them. RSS-Bridge is another option