Related: Is there something like a caniuse.com newsfeed that tells me when a feature has become supported by all major browsers (or, ideally, supported by major browsers for a month, half a year, a year …)?
Imagine if web.dev, the web development blog by the Chrome team, had the latest coolest tech like … RSS feeds for their blog. Then you could just subscribe to https://web.dev/series/baseline-newly-available and get notified about newly availble CSS features …
(To add insult to injury, they load their list of blog posts via JS, so you can't even point a good feed reader at the /blog/ page and have it scrape for new posts. Eww.)