RSS/Atom is great to follow blogs, news and some social network such as hackernews and reddit.

I hope X/Twitter back to this functionality, but that's a low probability.

Twitter killed their API and RSS feeds "to fight bots" :D

Which killed all the legitimate fun and useful bots and just left the astroturfing and discord sowing kind state sponsored bots.

As was the plan.

Nitter[0] seems to support it still, although it seems unmaintained - not sure how stable it is by this point. if you self host this, you should probably use burner account tokens, anti-botting measures might decide to shut down your X/twitter account

[0] https://github.com/zedeus/nitter

I just restarted using RSS recently. And I discovered I can also use it to track software releases (on github). The url is the release page with .atom appended. Eg

https://github.com/openzfs/zfs/releases.atom