I always thought the "planets"[1][2][3] were a neat idea. I wish there were more of them for dedicated topics. Then I can just subscribe to specific planets which pulls curated feeds from various blogs on that topic.

[1] Planet Gnome: https://planet.gnome.org/

[2] Planet Debian: https://planet.debian.org/

[3] Planet GNU: https://planet.gnu.org/