TechCrunch - http://feeds.feedburner.com/TechCrunch/
BetaNews - https://betanews.com/rss
SlashDot - http://rss.slashdot.org/Slashdot/slashdotMain
TechMeme - https://www.techmeme.com/feed.xml
MIT Technology Review - https://www.technologyreview.com/topnews.rss
Wired News - https://www.wired.com/rss/
Eureka Alert! - https://www.eurekalert.org/rss.xml
Here's an article about RSS and its fall from grace: https://twobithistory.org/2018/09/16/the-rise-and-demise-of-...
What's sad is that RSS was once the powerhouse of social sharing for most of a decade, giving blogs and websites a huge reach to rival any centralized and siloed platform like Facebook or Twitter.
I am subscribed to a lot of newsletters, and do most of content discovery via twitter.