Yeah, there's some sites that have killed their RSS feeds, and feeds can be tough to find (though there's browser extensions that fix that issue), but most major news organizations, blogging platforms, etc, support RSS. And for those that don't (including Twitter, Instagram, Github, etc), RSS Bridge can often fill the gap:
https://github.com/RSS-Bridge/rss-bridge
In short: RSS is my frontend to the web, and it's fantastic!
The whole podcasting space is going through a period of massive consolidation as podcast networks get bought up by the likes of Spotify and Apple (e.g. Gimlet). I won't be in the least bit surprised if those existing acquisitions are eventually forced to shut down their RSS feeds and go exclusive, and for new acquisitions to start out that way, as Netflix has proven content is the way to drive more subscribers to their platforms.
Meanwhile, Spotify and Apple have a huge advantage over RSS-based podcasts: data. The simple fact is, thanks to their walled garden, app-centric platforms, they can collect more behavioural data and target advertising more effectively, which means they draw advertisers away and make it a lot harder for everyone else to compete.
Do these headwinds stop the small players from continuing to publish via RSS? No, not at all. But if the bulk of the money and audience shifts to those walled gardens due to their owning the biggest names in the business while enabling the kind of surveillance capitalism that's so in demand, eventually the ecosystem built up around RSS is in danger of drying up.
https://addons.mozilla.org/en-US/firefox/addon/awesome-rss/
For Chrome I can't vouch for anything recently but I came across this a while back:
https://chrome.google.com/webstore/detail/get-rss-feed-url/k...
It sits in the sidebar and automatically updates so you can immediately see when a feed updates, then the feed renders in the main panel. This is very useful for news, status pages, and things like live YouTube events.